Poecilia sphenops is a species of fish, of the genus Poecilia, known under the common name molly; to distinguish it from its congeners, it is sometimes called short-finned molly or common molly. They inhabit fresh water streams and coastal brackish and marine waters from Mexico to Colombia. The wild-type fishes are dull, silvery in color. The molly can produce fertile hybrids with many Poecilia species, most importantly the sailfin molly. The male mollies generally tend to be mildly aggressive.
The silver trout is an extinct char species or subspecies that inhabited a few waters in New Hampshire in the United States prior to 1939, when a biological survey conducted on the Connecticut watershed by the New Hampshire Fish and Game Department found none.
The roach, or rutilus roach, also known as the common roach, is a fresh- and brackish-water fish of the family Cyprinidae, native to most of Europe and western Asia. Fish called roach can be any species of the genera Rutilus and Hesperoleucus, depending on locality. The plural of the term is also roach.
The thicktail chub was a type of minnow that inhabited the lowlands and weedy backwaters of the Sacramento and San Joaquin Rivers in the Central Valley of California. It was once abundant in lowland lakes, marshes, ponds, slow-moving stretches of river, and, during years of heavy run-off, the surface waters of San Francisco Bay. The thicktail chub was one of the most common fish in California. Within Native American middens it represented 40% of the fish.
Barbodes binotatus, commonly known as the spotted barb or common barb, is a tropical species of cyprinid fish endemic to Java, Indonesia.
The Australian marbled catshark is a catshark of the family Scyliorhinidae, found in the eastern Indian Ocean, endemic to Western Australia between latitudes 12 and 21°S, from the surface to 245 m (800 ft) deep. Its length is up to 60.0 cm, and it typically inhabits coastal waters with sandy or rocky bottoms.
The whitefin topeshark is a houndshark of the family Triakidae, found only in the tropical waters of the Philippines between latitudes 20° N and 5° N. They inhabit the coastal areas. They can grow up to a length of 96 cm. Adolescent specimens have dark areas on their caudal fins. The reproduction of this shark is ovoviviparous.
The spotted tilapia, also known as the spotted mangrove cichlid or black mangrove cichlid, is a species of fish of the cichlid family. It is native to fresh and brackish water in West and Central Africa, but has been introduced to other regions where it is considered invasive.
The roundscale spearfish is a species of marlin native to the eastern Atlantic Ocean from Portugal to Madeira, the Canary Islands to northern Africa and the western Mediterranean Sea to Sicily. It is suspected that it may be more widespread. It is believed to inhabit open waters. This species can reach a length of 184 centimetres (72 in) FL and the heaviest recorded fish weighed in at 21.5 kilograms (47 lb).
Labeobarbus mariae is a species of cyprinid fish.
The Ukrainian brook lamprey is a species of lamprey in the Petromyzontidae family. It is found in brackish and freshwater areas in Austria, Belarus, Bulgaria, the Czech Republic, Georgia, Hungary, Moldova, North Macedonia, Poland, Romania, Russia, Serbia and Montenegro, Slovakia, Turkey, and Ukraine. It invaded the basin of the Volga River in 2001.
The pinewoods darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the eastern United States where it is only known to occur in the Little Peedee River system in the Carolinas. It inhabits creeks, preferring gravel riffles and vegetated areas with strong currents. This species can reach a length of 7.6 centimetres (3.0 in) TL though most only reach about 5.2 centimetres (2.0 in).
Knipowitschia punctatissima, the Italian spring goby, is a species of goby endemic to Italy where it inhabits fresh, clear waters of springs, streams, and channels with slow water movements. This species can reach a length of 4.5 centimetres (1.8 in) SL.
The Tanganyika lates is a species of lates perch endemic to Lake Tanganyika. It is a widespread predator on other fishes. This species can reach a length of 200 centimetres (79 in) SL and the greatest recorded weight is 100 kilograms (220 lb). This species is important commercially and is also popular as a game fish. It is threatened by the pressures that these activities put upon the population.
The Syrman goby is a species of goby native to marine, brackish and probably fresh waters of the Black Sea, the Sea of Azov and the Caspian Sea basins. They inhabit inshore waters with substrates composed of shell fragments, sand, mud or muddy sand. This species can reach a length of 24.5 centimetres (9.6 in) TL.
The round sardinella is a species of ray-finned fish in the genus Sardinella found in both sides of the Atlantic Ocean and the Mediterranean Sea.
Enneapterygius flavoccipitis, the yellownape triplefin or northern bicoloured triplefin, in Australia, is a species of threefin blenny in the genus Enneapterygius.
The greenback guavina is a species of fish in the family Eleotridae that inhabits fresh, marine, and brackish waters in estuaries and mangrove swamps from Sri Lanka to Micronesia and Australia. This species grows to a length of 34 cm (13 in), though most do not exceed 15 cm (5.9 in). This species is the only known member of its genus.
Epinephelus labriformis, commonly called starry grouper or flag cabrilla is a species of marine ray-finned fish, a grouper from the subfamily Epinephelinae which is part of the family Serranidae, which also includes the anthias and sea basses. It is found in the eastern Pacific Ocean.
The white sucker is a species of freshwater cypriniform fish inhabiting the upper Midwest and Northeast in North America, but it is also found as far south as Georgia and as far west as New Mexico. The fish is commonly known as a "sucker" due to its fleshy, papillose lips that suck up organic matter and aufwuchs from the bottom of rivers and streams.
