Allfishes
Inconnu
Stenodus leucichthys
The general shape of the inconnu's body is very similar to that of the charr or …
Freshwater
Freshwater fish spend part or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than 1.05%.
Showing 121–144 of 245
Ladyfish
Elops saurus
The ladyfish has an elongated, slender, silvery body with a blue-green back and fine scales. It …
Least cisco
Coregonus sardinella
The body of the Least Cisco is elongated, somewhat compressed at the sides, with the greatest …
Least killifish
Heterandria formosa
Least killifish differ little in body shape from their closest relatives, the Poecilia. They have an …
Madtom, Brown
Noturus phaeus
Brown madtom has a dull coloration. The upper part of the body has a chocolate brown …
Madtoms: Black Madtom
Noturus funebris
The madtom is recognized by its unique fleshy fin. In non-madtom catfish, the fat fin protrudes …
Malabar danio
Devario malabaricus
The Malabar danio has a fusiform (spindle-shaped) body and is a larger, more robust relative of …
Malapterurus electricus
Malapterurus electricus
Malapterurus electricus has a characteristic appearance that distinguishes it from most other catfish. It has an …
Mango tilapia
Sarotherodon galilaeus
The mouth is small, with the lower jaw length being less than 1/3 of the total …
Mbu pufferfish
Tetraodon mbu
The Mbu pufferfish is the largest representative of the pufferfish family in the world. It is …
Minnow, Fathead
Pimephales promelas
The fathead minnow has a puny, deep, compressed body with a short, flattened head. The snout …
Minnow: Golden Shiner
Notemigonus crysoleucas
Minnows are characterized by a single dorsal fin, pelvic fins, soft fin rays, cycloid scales, and …
Mooneye
Hiodon tergisus
The Mooneye is a small fish with a compressed body that is deep in proportion to …
Mosquitofish
Gambusia affinis affinis
The male anal fin is modified and is an intermittent organ for introducing sperm into the …
Mozambique Tilapia
Oreochromis mossambicus
The best known member of the tilapia group is the Mozambique tilapia (Oreochromis mossambicus), which is …
Mullet
Mugil cephalus, Mugil curema
The striped mullet (Mugil cephalus) has a bluish-gray or green coloration along the back, turning to …
Muskellunge
Esox masquinongy
The muskellunge has an arrow-shaped body, long and smooth. The single dorsal fin with soft rays …
Muskellunge, Tiger
Esox masquinongy x Esox lucius
Tiger muskellunge was thought to be a separate species until scientists were able to cross northern …
Naked osman
Gymnodiptychus dybowskii
The naked osman has an elongated, fusiform (spindle-shaped) body that is slightly compressed laterally. The body …
Nelma
Stenodus nelma
Nelma has a spindle-shaped body that is slightly flattened on the sides. Its mouth is large, …
New Zealand longfin eel
Anguilla dieffenbachii
The New Zealand longfin eel possesses a long, slender body with a large mouth filled with …
Ninespine Stickleback
Pungitius pungitius
The stickleback gets its name from the short and long spines on the first dorsal fin, …
Northern snakehead
Channa argu
The northern snakehead has an elongated, cylindrical body with a flattened, snake-like head, which gives the …
One-lined pencilfish
Nannostomus unifasciatus
The name unifasciatus comes from the Latin words uni ("one") and fasciatus ("banded"), meaning "one-banded." The …