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Xenacanthus from the Triassic era 3D illustration
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.
Gulf coast mud salamander (Psuedotriton montanus flavissimus) full body on orange leaf
Axolotl. Mexican walking fish. Ambystoma mexicanum. Close up
amazing inhabitants of the microworld under a microscope
Aquatic (fresh water) nematode living in pond water among cyanobacteria. Live specimen. Wet mount, 10X objective, transmitted brightfield illumination.
Underwater image of Nurse shark in the blue ocean of Bimini, The Bahamas
Computer generated 3D illustration with an ammonoid
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
The Arctic grayling (Thymallus arcticus) is a species of freshwater fish in the salmon family Salmonidae. T. arcticus is widespread throughout the Arctic and Pacific drainages in Canada, Alaska, and Siberia, as well as the upper Missouri River drainage in Montana.  Wyoming.
Female and Male (on background) of Great Crested Newt (Triturus cristatus). Male's skin color and crest is typical for breeding time.
Banded Sea Snake Laticauda colubrina on a outer reef swimming to surface, looking for fresh water. Sea Snakes need to drink fresh water and regularly come onto land for that purpose. The Banded Sea Snake Laticauda colubrina occurs in tropical Indo-Pacific. Males maximum length 88 cm, females 142 cm. The Banded Sea Snake is often seen in large numbers in the company of hunting parties of giant trevally (Caranx ignobilis) and goatfish. Their cooperative hunting technique is similar to that of the moray eel, with the Snakes flushing out prey from narrow crevices and holes. \nThis specimen was encountered in the Triton Bay, Kaimana Regency, West Papua Province, Indonesia, 3°55'0.7321 S 134°6'7.7298 E.
Artificial aquarium with artificial fish that are good for fishing for predator fish
Aquarium tropical fish: otocinclus
Tropical fish swimming through the open water over coral reef
Computer generated 3D illustration with the extinct ichthyosaur Shonisaurus
Sheatfish Pterygoplichthys gibbiceps close-up in aquarium
Monotomidae, Coleoptera Fossil in Burmese amber of Cenomanian era, 100 million years ago, from the state of Myanmar, extreme macro shot
The halavi guitarfish - (Glaucostegus halavi), underwater photo into the Red Sea
The peacock flounder (Bothus mancus), also known as the flowery flounder, is a species of fish in the family Bothidae (lefteye flounders). The species is found widely in relatively shallow waters in the Indo-Pacific, also ranging into warmer parts of the east Pacific. Maui Island,
discus  fish in tank
Hammerhead shark swimming on the ocean floor.
couple of Fish Ancistrus - Catfish in a home freshwater aquarium with a green Anubias plants
The great barracuda (Sphyraena barracuda) also known as the giant barracuda swimming free in Cayman Brac - Cayman Islands
Rainbow fish swimming in a tank
Colorful sea cucumber-like corals.
The Yellow Multibanded Pipefish is a type of reef pipefish or flagtail pipefish.  In the wild, the Yellow Multibanded Pipefish can be found swimming under rocky overhangs, corals, or close to the floor of its reef habitat.
Flower Cardinalfish Ostorhinchus fleurieu occurs in the tropical Indo-West Pacific from the Red Sea, the Persian Gulf, the Gulf of Oman and scattered localities in East Africa to Seychelles, India, Sri Lanka, the Indo-Malayan region, and Hong Kong; south to Australia; east to Fiji in a depth range from 1-97m ( usually 1-37m), max. length 14.2cm. The species is common in shallow coastal reefs with moderate currents, also in tidal channels of estuaries. Adults are usually in small schools comprising pairs. The mouthbrooders form distinct pairs during courtship and spawning. \nBelow there are two Spotted-gill Cardinalfishes Ostorhinchus chrysopomus. The species occurs in the tropical Indo-West Pacific from the Indo-Malay Archipelago to New Guinea and Solomon Islands in a depth range from 2-25m, max. length 10cm. \nTriton Bay, Kaimana Regency, West Papua Province, Indonesia, \n3°51'48.03 S 133°55'48.96 E at 6m depth by night
Blue Streak Cleaner Wrasse in Saltwater Aquarium
Swell shark, Cephaloscyllium ventriosum, from central California to the Gulf of California
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