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Osteichtyes

Popular in this category (14,288)

Fauna

Mahi-mahi

The mahi-mahi or common dolphinfish is a surface-dwelling ray-finned fish found in off-shore temperate, tropical, and subtropical waters worldwide. Also widely called dorado and dolphin, it is one of two members of the Coryphaenidae family, the other being the pompano dolphinfish.

Fauna

Alligator gar

The alligator gar is a ray-finned euryhaline fish related to the bowfin in the infraclass Holostei. It is the largest species in the gar family, and among the largest freshwater fishes in North America. The fossil record traces its existence back to the Early Cretaceous over a hundred million years ago.

Fauna

Siamese fighting fish

The Siamese fighting fish, commonly known as the betta, is a popular fish in the aquarium trade. Bettas are a member of the gourami family and are known to be highly territorial. Males in particular are prone to high levels of aggression and will attack each other if housed in the same tank. If there is no means of escape, this will usually result in the death of one or both of the fish. Female bettas can also become territorial towards each other if they are housed in too small of an aquarium. It is typically not recommended to keep male and female bettas together, except temporarily for breeding purposes which should always be undertaken with caution.

Fauna

Electric eel

The electric eel is a South American electric fish, and the only species in its genus. Despite the name, it is not an eel, but rather a knifefish.

Fauna

Carassin

The goldfish is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is one of the most commonly kept aquarium fish.

Fauna

Sunfish

The ocean sunfish or common mola is one of the heaviest known bony fishes in the world. Adults typically weigh between 247 and 1,000 kg (545–2,205 lb). The species is native to tropical and temperate waters around the globe. It resembles a fish head with a tail, and its main body is flattened laterally. Sunfish can be as tall as they are long when their dorsal and ventral fins are extended.

Fauna

Muskellunge

The muskellunge (Esox masquinongy), also known as muskelunge, muscallonge, milliganong, or maskinonge, is a species of large, relatively uncommon freshwater fish native to North America. The muskellunge is the largest member of the pike family, Esocidae. The common name comes from the Ojibwa word maashkinoozhe, meaning "ugly pike", by way of French masque allongé, "elongated face." The French common name is masquinongé or maskinongé.

Fauna

Rainbow trout

The rainbow trout is a trout and species of salmonid native to cold-water tributaries of the Pacific Ocean in Asia and North America. The steelhead is an anadromous (sea-run) form of the coastal rainbow trout (O. m. irideus) or Columbia River redband trout (O. m. gairdneri) that usually returns to fresh water to spawn after living two to three years in the ocean. Freshwater forms that have been introduced into the Great Lakes and migrate into tributaries to spawn are also called steelhead.

Fauna

Swordfish

Swordfish, also known as broadbills in some countries, are large, highly migratory, predatory fish characterized by a long, flat bill. They are a popular sport fish of the billfish category, though elusive. Swordfish are elongated, round-bodied, and lose all teeth and scales by adulthood. These fish are found widely in tropical and temperate parts of the Atlantic, Pacific, and Indian Oceans, and can typically be found from near the surface to a depth of 550 m (1,800 ft). They commonly reach 3 m (9.8 ft) in length, and the maximum reported is 4.55 m (14.9 ft) in length and 650 kg (1,430 lb) in weight.

Fauna

Pike

The northern pike, known simply as a pike in Britain, Ireland, most of Canada, and most parts of the United States, is a species of carnivorous fish of the genus Esox. They are typical of brackish and fresh waters of the Northern Hemisphere.

Fauna

Candiru

Candiru, also known as cañero, toothpick fish, or vampire fish, is a species of parasitic freshwater catfish in the family Trichomycteridae native to the Amazon Basin where it is found in the countries of Bolivia, Brazil, Colombia, Ecuador and Peru.

Fauna

Walleye

Walleye is a freshwater perciform fish native to most of Canada and to the Northern United States. It is a North American close relative of the European zander, also known as the pikeperch. The walleye is sometimes called the yellow walleye to distinguish it from the blue walleye, which is a subspecies that was once found in the southern Ontario and Quebec regions, but is now presumed extinct. However, recent genetic analysis of a preserved (frozen) 'blue walleye' sample suggests that the blue and yellow walleye were simply phenotypes within the same species and do not merit separate taxonomic classification.

Fauna

Atlantic bluefin tuna

The Atlantic bluefin tuna is a species of tuna in the family Scombridae. It is variously known as the northern bluefin tuna, giant bluefin tuna [for individuals exceeding 150 kg (330 lb)] and formerly as the tunny.

Fauna

Guppy

The guppy, also known as millionfish and rainbow fish, is one of the world's most widely distributed tropical fish, and one of the most popular freshwater aquarium fish species. It is a member of the family Poeciliidae and, like almost all American members of the family, is live-bearing. Guppies, whose natural range is in northeast South America, were introduced to many habitats and are now found all over the world. They are highly adaptable and thrive in many different environmental and ecological conditions. Male guppies, which are smaller than females, have ornamental caudal and dorsal fins. Wild guppies generally feed on a variety of food sources, including benthic algae and aquatic insect larvae. Guppies are used as a model organism in the fields of ecology, evolution, and behavioural studies.

Fauna

Haddock

The haddock is a saltwater fish from the family Gadidae, the true cods, it is the only species in the monotypic genus Melanogrammus. It is found in the North Atlantic Ocean and associated seas where it is an important species for fisheries, especially in northern Europe. It is also an important food fish and it is marketed fresh, frozen or smoked, smoked varieties include the "Finnan haddie" and the "Arbroath smokie".