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Asian swamp eel Monopterus albus isolated on white background
Mudskipper (Pseudapocryptes elongatus) is natural fish, this is delicious fish so that ussualy use i Viet Nam.
Sturgeon - Acipenseridae fish
The American scalefish, or lepidosiren Lepidosiren paradoxa is a lungfish, the only species of the genus scalefish and the family scalefish among aquatic vegetation
Aquatic (fresh water) nematode living in pond water among cyanobacteria. Live specimen. Wet mount, 10X objective, transmitted brightfield illumination.
Selective focus of The zig-zag eel (Mastacembelus armatus), also known as the tire-track eel, tire-track spiny eel or marbled spiny eel.
Sturgeon underwater in aquarium
Large, fresh, not dead snakehead fish placed isolated on a white background.
Red tailed catfish
Indian pike conger isolated on white, congresox talabonoides
Axolotl. Mexican walking fish. Ambystoma mexicanum
Unique ancient lungfish, surviving from the Jurassic period. Lives in reservoirs with stagnant water, often drying up and overgrown with aquatic vegetation. In the dry season digs in the ground \
Rat tailed maggot photographed in a studio
Close Up of Shortfin eel ,Anguilla bicolor isolated on white background
an eel searches for food on the Los Llanos region of Colombia
Fresh thailand eel on white background
Colorful Coral Reef Teeming with Exotic Fish. Lively and colorful coral reef in a vibrant underwater world. Diverse array of tropical fish swimming freely in their aquatic environment, creating a mesmerizing scene for nature and animal enthusiasts alike.
Jundiara Catfish (Pseudoplatystoma sp x Leiarius marmoratus) - Hybrid Freshwater Fish
A school of venomous  Striped Eel Catfish (Plotosus lineatus).  Their spines are highly venomous and potentially fatal.  They group together as a means of protection from predators.  Location Andaman sea, Thailand.
The reedfish, ropefish (more commonly used in the United States), or snakefish, Erpetoichthys calabaricus, is a species of fish in the family Polypteridae alongside the bichirs. It is the only member of the genus Erpetoichthys. It is native to fresh and brackish waters in West and Central Africa. The reedfish possesses a pair of lungs in addition to gills, allowing it to survive in very oxygen-poor water. It is threatened by habitat loss through palm oil plantations, other agriculture, deforestation, and urban development
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Catfish, Japanese catfish, Japanese freshwater fish, native species, studio shot on white background
Haliotis kamtschatkana, northern abalone or pinto abalone, is a species of large sea snail, a marine gastropod mollusc in the family Haliotidae, the abalones. It has been listed as \
New Zealand Long fin eel gathering in stream writhing and slimy.
Pacific herring swimming in the aquarium
Sea Lamprey or petromyzon marinus in a tank. The animal is a bloodsucking sea creature
Aquarium tropical fish: otocinclus
Close Up of Eel Swimming in Lake In Auckland New Zealand
Axolotl. Mexican walking fish. Ambystoma mexicanum
Free Images: "bestof:Conger Eel - Head of larvathe mouth normal.jpeg check categories 13 September 2015 2 Conger Eel Head of larva the mouth normal Subject Eels--Embryology"
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