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Oscar Fish – Invasive Species – Part 35

Invasive Species in USA Waterways - Part 35

Oscar Fish

Astronotus ocellatus

To clarify, the Oscar fish is an invasive species of freshwater fish in the cichlid family. While, there are various types of Oscar fish, the three main Oscar Fish Types are the Tiger Oscar, Red Oscar and Albino Oscar. While, the Blue, Black, Florida, White, Green, Veil Tail and Lemon Oscars are mixes of the three main types of fish.

Furthermore, native to South America. But, a popular aquarium fish.

Invasive Species Definition

The definition of an invasive species is any species that is not native to our ecosystems and cause harm when introduced to the ecosystems. Furthermore, these may include amphibians, plants, insects, fish, fungus, bacteria and more. Further, impacts on the environment may cause economic loss or affect human health.

While, Invasive species tend to grow and reproduce quickly and spread aggressively with the potential to cause harm on the environment, economy or even human health. Therefore, given the label “invasive”.

Description of the Oscar Fish

Albino Oscar Fish
Albino Oscar Fish

While, the Astronotus ocellatus weighs approximately 3.5 pounds. Generally, reach 11 or 12 inches. But, may rarely exceed 14 to 15 inches.

Wild forms are generally darkly colored with yellow-ringed spots (ocelli) on the caudal peduncle and on the dorsal fin. Further, bright orange opercle margin and ventral parts of the lateral sides of the body.

While, these ocelli function to limit fin-nipping by piranhas in the Oscar fish natural native environments. Meanwhile, they can rapidly alter in coloration, facilitating ritualized territorial and combat behaviors amongst conspecifics.

Furthermore, male Oscars have dark blotches on the base of the dorsal fins. While, juvenile fish has a different coloration than the adults. Moreover, being striped with white and orange wavy bands and spotted heads.

Generally, have large mouths with thick lips. While, they have seven preopercular pores, the first gill arch is without lobe while gill rakers are short and thick with many denticles.

Furthermore, Oscars have 12 – 14 dorsal spines with 19 – 21 soft dorsal rays and 3 anal spines with 15 – 17 soft anal rays. While, the dorsal and anal fins bases are densely scaled with many branched rays.

Difference Types of Oscar Fish

Characteristics Tiger Oscar Red Oscar Albino Oscar
Color Form Black, Red, Orange Orange, Red Red, White
Eye Color Red Eye with Black Rim Black with Orange Rim Red with White Rim
Diet Omnivore Eats Anything and Everything Omnivore
Water Temperature 72°F - 77°F 72 - 77°F 72°F - 77°F
Max Size of the Astronotus ocellatus 12 Inches 11 – 12 Inches 11 – 12 Inches
Temperament Semi-Aggressive Aggressive / Semi-Aggressive Semi-Aggressive

Biology of the Oscar Fish

While, the Oscar is a very intelligent tropical fish renowned for their personalities.

Habitat

Meanwhile, a freshwater Tropical fish living in shallow slow-moving white-water habitats in canals and ponds with a mud or sand substrate. Generally, sheltering under submerged branches.

While, ideal conditions include pH ranges between 6.0 and 8.0. and water temperatures ranging from 71.5°F to 77°F. However, the Oscar Fish does not tolerate cold water temperatures, with lower lethal limits for the species being 55.22°F.

Diet

Generally, the Oscar Fish is an omnivore feeding on vegetation, crayfish, worms, insect larvae and small fry. However, not fussy eaters and readily eat other forms of sustenance.

Furthermore, regularly feed on crustaceans, water bugs, water fleas, daphnia, and gastropods. Generally, slow and inert fish. However, when going after prey they can be swift and nimble.

Reproduction

The Oscar is widely regarded as sexually monomorphic with males and growing more quickly than females. While, the species reaches sexual maturity around one year of age. Further, reproduction continues for 9 – 10 years.

While, the frequency and timing of spawning may be related to the occurrence of rain. Both males and female Oscar fish clean a suitable spawning site. Generally, on a flat rock or branch or excavate a circular nest in shallow waters.

While, depositing thousands of eggs which are guarded by the parents. Generally, eggs have in 3 to 4 days and the parents move the fry to a shallow pit in the sand where they stay for 6 to 7 days. Until they become free swimming.

Tiger Oscar Fish with Eggs
Tiger Oscar Fish

Distribution of the Astronotus ocellatus

Generally, found in South America including Peru, Ecuador, Colombia, Brazil, French Guiana, the Amazon River Basin along the Amazon, Icá Negro, Solimōes and Ucayali River systems. As well as, in the Approuague and Oyapock River drainages. Furthermore, the Oscar fish also occurs in China, Australia, Africa and the United States.

Effect on the Ecosystem

However, potentially competes with native fish for food and spawning areas. Especially affecting the sunfish. While, the Oscar Fish is a predator and further reduces numbers of native fish and invertebrates.

Introduction to the USA of the Oscar

Red Oscar Fish
Red Oscar Fish

The first records of the Oscar fish in Florida was due to deliberate stocking from aquariums. While, attempts were made to popularize the species as a sport fish.

As a result, has led to anglers farther releasing this fish into other water sources. Furthermore, this fish can currently be found in Florida, Hawaii and Puerto Rico.

In short, Oscar fish in the United States, especially in Florida are presumed to be contaminated with mercury. Therefore, limited consumption is recommended.

Conservation of the Astronotus ocellatus

The Oscar Fish was readily introduced to various parts of the United States. However, after numerous attempts by the fishery industry to get this species to establish itself. The only populations that have readily established and reproduced has been the population in Florida.

Anglers, have further spread this species to various water sources, where it was not otherwise introduced. Therefore, angling of this species, being a sport fish, is highly prized. However, good size Oscar fish can be eaten in moderation due to mercury contamination. While, this fish is also a popular aquarium fish. Therefore, looked after by the aquarium trade.

Full list of articles on Invasion species here

All the articles regarding the invasion species is listed below for your convenience

  • bow-river-canada-forest-219972

    Invasion of Alien Species in USA Waterways

    Main article

  • Asian Clam1

    Asian Clams - Invasive Species in USA Waterways - Part 2

    Article relating to Asian clam

  • Zebra and Quagga Mussel

    Zebra vs Quagga Mussels - Invasive Species in USA Waterways - Part 3

    Article relating to Zebra and Quagga Mussel

  • Armored Catfish

    Armored Catfish - Invasive Species in USA Waterways - Part 4

    Article relating to Armored Catfish

  • Tiger Prawn

    Giant Tiger Prawns - Invasive Species in USA Waterways - Part 5

    Article relating to Giant Tiger Prawn

  • Red and Common Lionfish

    Red and Common Lionfish - Invasive Species in USA Waterways - Part 6

    Article relating to Red and Common Lionfish

  • Asian Carp

    Asian Carp - Invasive Species in USA Waterways - Part 7

    Article relating to Asian Carp

  • Asian Tapeworm

    Asian Tapeworm - Invasive Species in USA Waterways - Part 8

    Article relating to Asian Tapeworm

  • Swim Bladder Worm, nematodes are an invasive species

    Swim Bladder Worm - Invasive Species in USA Waterways - Part 9

    Article relating to Swim Bladder Worm

  • Titan and Bay invasive species on rock

    Barnacle Bay And Titan Acorn - Invasive Species in USA Waterways - Part 10

    Article relating to Barnacle Bay and Titan Acorn

  • Invasive species Nutria, for Nutria fur often confused nutria vs muskrat

    Nutria - Invasive Species in USA Waterways - Part 11

    Article relating to Nutria.

  • Didymo and invasive species

    Didymo - Invasive Species in USA Waterways - Part 12

    Article relating to Didymo.

  • Killer Algae and invasive species in Waterways

    Killer Algae - Invasive Species in USA Waterways - Part 13

    Article relating to Killer Algae.

  • Largemouth Bass and Invasive Species

    Largemouth Bass - Invasive Species in USA Waterways - Part 14

    Article relating to Largemouth Bass.

  • Smallmouth Bass an invasive species

    Smallmouth Bass – Invasive Species In USA Waterways – Part 15

    Article relating to Smallmouth Bass

  • Australian Tube Worms are an invasive species

    Australian Tube Worm – Invasive Species In USA Waterways – Part 16

    Article relating to Australian Tube Worm.

  • Spiny and Fishhook Water Flea an invasive species

    Spiny And Fishhook Water Flea – Invasive Species In USA Waterways – Part 17

    Article relating to Spiny and Fishhook Water Flea.

  • Faucet Snail an invasive species

    Faucet Snail – Invasive Species In USA Waterways – Part 18

    Article relating to Faucet Snail.

  • Spectacled Caiman and invasive species

    Spectacled Caiman – Invasive Species In USA Waterways – Part 19

    Article relating to Spectacled Caiman.

  • Brazilian Waterweed

    Brazilian Waterweed – Invasive Species In USA Waterways – Part 20

    Article relating to Brazilian Waterweed.

  • Daphnia Water Flea an invasive species

    Daphnia – Invasive Species In USA Waterways – Part 21

    Article relating to Daphnia.

  • Common Slipper Shell and Invasive species

    Common Slipper Shell – Invasive Species in USA Waterways – Part 22

    Article relating to Common Slipper Shell.

  • Redbelly, spotted tilapia and Blue Tilapia an invasive species

    Tilapia – Invasive Species in USA Waterways – Part 23

    Article relating to Tilapia.

  • Nile Monitor and Invasive species in Florida

    Nile Monitor – Invasive Species in USA Waterways – Part 24

    Article relating to Nile Monitor.

  • Common Water Hyacinth as invasive species including water hyacinth control and water hyacinth use

    Common Water Hyacinth – Invasive Species in USA Waterways – Part 25

    Article relating to Common Water Hyacinth.

  • Chinese Mitten Crab an invasive species

    Chinese Mitten Crab – Invasive Species in USA Waterways – Part 26

    Article relating to Chinese Mitten Crab.

  • Red-Rimmed Melania an invasive species

    Red-Rimmed Melania – Invasive Species in USA Waterways – Part 27

    Article relating to Red-Rimmed Melania.

  • Brown Bullhead an invasive species related to the Yellow Bullhead

    Brown Bullhead – Invasive Species in USA Waterways – Part 28

    Article relating to Brown Bullhead

  • Southern water snake and northern water snake invasive species

    Water Snake – Invasive Species in USA Waterways – Part 29

    Article relating to Water Snake.

  • Eurasian Water Milfoil, an invasive species required eurasian watermilfoil control

    Eurasian Water Milfoil – Invasive Species in USA Waterways – Part 30

    Article relating to Eurasian Water Milfoil.

  • Signal Crayfish an invasive species

    Signal Crayfish – Invasive Species in USA Waterways – Part 31

    Article relating to Signal Crayfish.

  • Virile Crayfish an invasive species

    Virile Crayfish – Invasive Species in USA Waterways – Part 32

    Article relating to Virile Crayfish.

  • Louisiana Crawfish an invasive species

    Louisiana Crawfish – Invasive Species in USA Waterways – Part 33

    Article relating to Louisiana Crawfish.

  • Chinese Mystery Snail an invasive species

    Chinese Mystery Snail – Invasive Species in USA Waterways – Part 34

    Article relating to Chinese Mystery Snail.

  • Oscar Fish an invasive species of oscar fish types

    Oscar Fish – Invasive Species in USA Waterways – Part 35

    Article relating to Oscar Fish.

  • Watercress an invasive species

    Watercress – Invasive Species in USA Waterways – Part 36

    Article relating to Watercress.

  • Pike Topminnow an invasive species

    Pike Topminnow – Invasive Species in USA Waterways – Part 37

    Article relating to Pike Topminnow.

  • African Clawed Frog an invasive species

    African Clawed Frog – Invasive Species in USA Waterways – Part 38

    Article relating to African Clawed Frog.

  • Curly-Leaf Pondweed an invasive species

    Curly Leaf Pondweed – Invasive Species in USA Waterways – Part 39

    Article relating to Curly Leaf Pondweed.

  • Gribble an invasive species

    Gribble – Invasive Species in USA Waterways – Part 40

    Article relating to Gribble.

  • Apple Snail an invasive species

    Apple Snail – Invasive Species in USA Waterways – Part 41

    Article relating to Apple Snail.

  • Walking Catfish an invasive species

    Walking Catfish – Invasive Species in USA Waterways – Part 42

    Article relating to Walking Catfish.

  • Blue Catfish an invasive species

    Blue Catfish – Invasive Species in USA Waterways – Part 43

    Article relating to Blue Catfish.

  • Channel Catfish an invasive species

    Channel Catfish – Invasive Species in USA Waterways – Part 44

    Article relating to Channel Catfish.

  • Red-Eared Slider an invasive species

    Red-Eared Slider – Invasive Species in USA Waterways – Part 45

    Article relating to Red-Eared Slider.

  • Giant Salvinia an invasive species

    Giant Salvinia – Invasive Species – Part 46

    Article relating to Giant Salvinia.

  • European Green Crab an invasive species

    European Green Crab – Invasive Species in USA Waterways – Part 47

    Article relating to European Green Crab.

  • Northern Snakehead an invasive species

    Northern Snakehead – Invasive Species in USA Waterways – Part 48

    Article relating to Northern Snakehead.

  • Veined Rapa Whelk an invasive species

    Veined Rapa Whelk – Invasive Species in USA Waterways – Part 49

    Article relating to Veined Rapa Whelk.

  • Sea Lamprey an invasive species

    Sea Lamprey – Invasive Species in USA Waterways – Part 50

    Article relating to Sea Lamprey.

  • Flowering Rush an invasive species

    Flowering Rush – Invasive Species in USA Waterways – Part 51

    Article relating to Flowering Rush.

  • Japanese Shore Crab an invasive species

    Japanese Shore Crab – Invasive Species in USA Waterways – Part 52

    Article relating to Japanese Shore Crab.

  • New Zealand Mud Snail an invasive species

    New Zealand Mud Snail – Invasive Species in USA Waterways – Part 53

    Article relating to New Zealand Mud Snail.

  • Common Periwinkle an invasive species

    Common Periwinkle – Invasive Species in USA Waterways – Part 54

    Article relating to Common Periwinkle.

  • Mayan Cichlid an invasive species

    Mayan Cichlid – Invasive Species in USA Waterways – Part 55

    Article relating to Mayan Cichlid.

  • Peacock Cichlid an invasive species

    Peacock Cichlid – Invasive Species in USA Waterways – Part 56

    Article relating to Peacock Cichlid.

  • Wild Taro an Invasive Species

    Wild Taro – Invasive Species in USA Waterways – Part 57

    Article relating to Wild Taro.

  • Common Rudd an Invasive Species

    Common Rudd – Invasive Species in USA Waterways – Part 58

    Article relating to Common Rudd.

  • Green Swordtail an invasive species

    Green Swordtail – Invasive Species in USA Waterways – Part 59

    Article relating to Green Swordtail.

  • White Perch an invasive species

    White Perch – Invasive Species in USA Waterways – Part 60

    Article relating to White Perch.

  • Alewife an invasive species

    Alewife – Invasive Species in USA Waterways – Part 61

    Article relating to Alewife.

  • Yellowfin Goby an invasive species

    Yellowfin Goby – Invasive Species in USA Waterways – Part 62

    Article relating to Yellowfin Goby.

  • Round Goby an Invasive Species

    Round Goby – Invasive Species in USA Waterways – Part 63

    Article relating to Round Goby.

  • Common Reed an Invasive Species

    Common Reed – Invasive Species in USA Waterways – Part 64

    Article relating to Common Reed.

  • Red Shiner an invasive species

    Red Shiner – Invasive Species in USA Waterways – Part 65

    Article relating to Red Shiner.

  • Eastern Mosquitofish an Invasive Species

    Eastern Mosquitofish – Invasive Species in USA Waterways – Part 66

    Article relating to Eastern Mosquitofish.

  • Eurasian Ruffe an Invasive Species

    Eurasian Ruffe – Invasive Species in USA Waterways – Part 67

    Article relating to Eurasian Ruffe.

  • Green Sunfish an Invasive Species

    Green Sunfish – Invasive Species in USA Waterways – Part 68

    Article relating to Green Sunfish.

  • Oriental Weather Loach an Invasive Species

    Oriental Weather Loach – Invasive Species in USA Waterways – Part 69

    Article relating to Oriental Weather Loach.

  • Asian Swamp Eel

    Asian Swamp Eel – Invasive Species in USA Waterways – Part 70

    Article relating to Asian Swamp Eel.

  • Asian Carp

    Asian Carp

    Article relating to Asian Carp

  • Armored Catfish

    Armored Catfish

    Article relating to Armored Catfish

  • Red and Common Lionfish

    Red and Common Lionfish

    Article relating to Red and Common Lionfish

  • Largemouth Bass and Invasive Species

    Largemouth Bass

    Article relating to Largemouth Bass.

  • Smallmouth Bass an invasive species

    Smallmouth Bass

    Article relating to Smallmouth Bass

  • Redbelly, spotted tilapia and Blue Tilapia an invasive species

    Tilapia

    Article relating to Tilapia.

  • Brown Bullhead an invasive species related to the Yellow Bullhead

    Brown Bullhead

    Article relating to Brown Bullhead.

  • Oscar Fish an invasive species of oscar fish types

    Oscar Fish

    Article relating to Oscar Fish.

  • Pike Topminnow an invasive species

    Pike Topminnow

    Article relating to Pike Topminnow.

  • Walking Catfish an invasive species

    Walking Catfish

    Article relating to Walking Catfish.

  • Blue Catfish an invasive species

    Blue Catfish

    Article relating to Blue Catfish.

  • Channel Catfish an invasive species

    Channel Catfish

    Article relating to Channel Catfish.

  • Northern Snakehead an invasive species

    Northern Snakehead

    Article relating to Northern Snakehead.

  • Sea Lamprey an invasive species

    Sea Lamprey

    Article relating to Sea Lamprey.

  • Mayan Cichlid an invasive species

    Mayan Cichlid

    Article relating to Mayan Cichlid.

  • Peacock Cichlid an invasive species

    Peacock Cichlid

    Article relating to Peacock Cichlid.

  • Common Rudd an Invasive Species

    Common Rudd

    Article relating to Common Rudd.

  • Green Swordtail an invasive species

    Green Swordtail

    Article relating to Green Swordtail.

  • White Perch an invasive species

    White Perch

    Article relating to White Perch.

  • Alewife an invasive species

    Alewife

    Article relating to Alewife.

  • Yellowfin Goby an invasive species

    Yellowfin Goby

    Article relating to Yellowfin Goby.

  • Round Goby an Invasive Species

    Round Goby

    Article relating to Round Goby.

  • Red Shiner an invasive species

    Red Shiner

    Article relating to Red Shiner.

  • Eastern Mosquitofish an Invasive Species

    Eastern Mosquitofish

    Article relating to Eastern Mosquitofish.

  • Eurasian Ruffe an Invasive Species

    Eurasian Ruffe

    Article relating to Eurasian Ruffe.

  • Green Sunfish an Invasive Species

    Green Sunfish

    Article relating to Green Sunfish.

  • Oriental Weather Loach an Invasive Species

    Oriental Weather Loach

    Article relating to Oriental Weather Loach.

  • Asian Swamp Eel

    Asian Swamp Eel

    Article relating to Asian Swamp Eel.

  • Tiger Prawn

    Giant Tiger Prawns

    Article relating to Giant Tiger Prawns

  • Titan and Bay invasive species on rock

    Barnacle Bay And Titan Acorn

    Article relating to Barnacle Bay and Titan Acorn.

  • Spiny and Fishhook Water Flea an invasive species

    Spiny And Fishhook Water Flea

    Article relating to Spiny and Fishhook Water Flea.

  • Daphnia Water Flea an invasive species

    Daphnia

    Article relating to Daphnia.

  • Chinese Mitten Crab an invasive species

    Chinese Mitten Crab

    Article relating to Chinese Mitten Crab.

  • Signal Crayfish an invasive species

    Signal Crayfish

    Article relating to Signal Crayfish.

  • Virile Crayfish an invasive species

    Virile Crayfish

    Article relating to Virile Crayfish.

  • Louisiana Crawfish an invasive species

    Louisiana Crawfish

    Article relating to Louisiana Crawfish.

  • Gribble an invasive species

    Gribble

    Article relating to Gribble.

  • European Green Crab an invasive species

    European Green Crab

    Article relating to European Green Crab.

  • Japanese Shore Crab an invasive species

    Japanese Shore Crab

    Article relating to Japanese Shore Crab.

  • Asian Tapeworm

    Asian Tapeworm

    Article relating to Asian Tapeworm

  • Swim Bladder Worm, nematodes are an invasive species

    Swim Bladder Worm

    Article relating to Swim Bladder Worm

  • Australian Tube Worms are an invasive species

    Australian Tube Worm

    Article relating to Australian Tube Worm.

  • Invasive species Nutria, for Nutria fur often confused nutria vs muskrat

    Nutria

    Article relating to Nutria.

  • Asian Clam

    Asian Clams

    Article relating to Asian Clams

  • Zebra and Quagga Mussel

    Zebra vs Quagga Mussels

    Article relating to Zebra and Quagga Mussel

  • Faucet Snail an invasive species

    Faucet Snail

    Article relating to Faucet Snail.

  • Red-Rimmed Melania an invasive species

    Red-Rimmed Melania

    Article relating to Red-Rimmed Melania.

  • Chinese Mystery Snail an invasive species

    Chinese Mystery Snail

    Article relating to Chinese Mystery Snail.

  • Apple Snail an invasive species

    Apple Snail

    Article relating to Apple Snail.

  • New Zealand Mud Snail an invasive species

    New Zealand Mud Snail

    Article relating to New Zealand Mud Snail.

  • Oscar Fish an invasive species of oscar fish types

    Common Slipper Shell

    Article relating to Common Slipper Shell

  • Veined Rapa Whelk an invasive species

    Veined Rapa Whelk

    Article relating to Veined Rapa Whelk.

  • Common Periwinkle an invasive species

    Common Periwinkle

    Article relating to Common Periwinkle.

  • Killer Algae and invasive species in Waterways

    Killer Algae

    All articles relating to Killer Algae.

  • Brazilian Waterweed

    Brazilian Waterweed

    Article relating to Brazilian Waterweed.

  • Common Water Hyacinth as invasive species including water hyacinth control and water hyacinth use

    Common Water Hyacinth

    Article relating to Common Water Hyacinth.

  • Eurasian Water Milfoil, an invasive species required eurasian watermilfoil control

    Eurasian Water Milfoil

    Article relating to Eurasian Water Milfoil.

  • Watercress an invasive species

    Watercress

    Article relating to Watercress.

  • Curly-Leaf Pondweed an invasive species

    Curly Leaf Pondweed

    Article relating to Curly Leaf Pondweed.

  • Giant Salvinia an invasive species

    Giant Salvinia

    Article relating to Giant Salvinia.

  • Flowering Rush an invasive species

    Flowering Rush

    Article relating to Flowering Rush.

  • Wild Taro an Invasive Species

    Wild Taro

    Article relating to Wild Taro.

  • Common Reed an Invasive Species

    Common Reed

    Article relating to Common Reed.

  • Spectacled Caiman and invasive species

    Spectacled Caiman

    Article relating to Spectacled Caiman.

  • Nile Monitor and Invasive species in Florida

    Nile Monitor

    Article relating to Nile Monitor.

  • Southern water snake and northern water snake invasive species

    Water Snake

    Article relating to Water Snake.

  • African Clawed Frog an invasive species

    African Clawed Frog

    Article relating to African Clawed Frog.

  • Red-Eared Slider an invasive species

    Red-Eared Slider

    Article relating to Red-Eared Slider.

  • Didymo and invasive species

    Didymo

    All articles pertaining to Didymo.

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Oscar Fish – Invasive Species – Part 35

by Paula Goble time to read: 4 min
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