The swell shark is a catshark in the family Scyliorhinidae. It is found in the tropical and subtropical eastern Pacific Ocean from between central California to southern Mexico, with an additional population off the coast of Chile. As a defense, the swell shark is able to expand to approximately double its regular size by swallowing water.
The sand goby, also known as a polewig or pollybait, is a species of ray-finned fish native to marine and brackish European waters from the Baltic Sea through the Mediterranean Sea and into the Black Sea where it occurs in sandy or muddy areas of inshore waters at depths of from 4 to 200 metres. This species can reach a length of 11 centimetres (4.3 in) TL. This species is sometimes kept in public aquariums. The sand goby is of a sandy colour, with darker markings on the sides and a creamy-white underside. In the breeding season the male fish has blue spot at the rear of the first dorsal fin, ringed with white. The fish has a slender body, and the head is about a quarter of the total length.
The smalleye catshark is a species of shark beloning to the family Pentanchidae, the deepwater catsharks. This shark is found in the southeast Atlantic at depths between 700 and 2,000 m. It can grow up to 61 cm. The reproduction of this catshark is oviparous.
Akysis is the largest genus of catfishes of the family Akysidae.
The pygmy rainbowfish is a species of rainbowfish in the subfamily Melanotaeniinae. It is endemic to Australia.
The sharp-jawed buntingi is a species of ricefish in the family Adrianichthyidae. It is endemic to Lake Poso in Sulawesi, Indonesia.
The egg-carrying buntingi is a species of fish in the family Adrianichthyidae. It is endemic to Lake Poso in Sulawesi, Indonesia.
The common goby is a species of ray-finned fish native to fresh and brackish waters along the Atlantic and Baltic Sea coasts of Europe and northern Africa, with a range stretching from Norway to Morocco and Mauritania. It is also found in the Canary Islands. This species reaches a maximum length of 9 centimetres (3.5 in) TL.
Akysis pulvinatus is a species of stream catfish. It is known only from the western half of the Kra Isthmus, in southern Thailand.
Pareiorhina rudolphi is a species of armored catfish endemic to Brazil where it occurs in the Paraíba do Sul River near Lorena, São Paulo State, Brazil. This species grows to a length of 4.5 centimetres (1.8 in) TL.
Chiloglanis microps is a species of upside-down catfish endemic to the Democratic Republic of the Congo where it occurs in the Lufira River system. This species grows to a length of 5.6 centimetres (2.2 in) SL.
The smalleye stingray is a large species of stingray in the family Dasyatidae, measuring up to 2.2 m (7.2 ft) across. Rare but widely distributed, it is found in the Indo-Pacific from Mozambique to India to northern Australia. This species may be semi-pelagic in nature, inhabiting both deeper waters and shallow coastal reefs and estuaries. It is characterized by a diamond-shaped pectoral fin disc much wider than long, a tail that is broad and flattened in front of the spine but whip-like behind, and large white spots over its back.
The Modoc sucker is a rare species of freshwater fish native to northern California and southern Oregon. It grows to a length of about 7 in (18 cm) and becomes sexually mature at 4 in (10 cm). It feeds on algae, small invertebrates and detritus, and hides under stones, detritus and overhanging vegetation. It is found in only a few streams and is listed as an endangered species in California and the United States. Conservation measures have been put in place such as fencing the streams in which it lives from livestock. It was previously rated as "endangered" in 1973 by the International Union for Conservation of Nature, but this rating has now been changed to "near threatened", and the U.S. Fish and Wildlife Service removed the Modoc sucker from the federal list of endangered and threatened wildlife in 2016.
Akysis bilustris is a species of catfish belonging to the family Akysidae, known only from two geographically proximate localities in the Xe Kong drainage, a major subdrainage of the Mekong River, in Laos and Cambodia. This species grows to a length of 2.57 centimetres (1.01 in) SL.
Nebris is a small genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. There are two species in the genus, one in the Western Atlantic Ocean and one in the Eastern Pacific Ocean.
Akysis recavus is a species of fish in the family Akysidae, the stream catfishes. It is native to Thailand, where it occurs in the Chao Phraya River. It has also been reported from the Mekong basin in Laos.
Akysis vespa is a species of fish in the family Akysidae, the stream catfishes. It is endemic to Burma, where it occurs in the Ataran River drainage. This species was described to science in 2004.
The crested oarfish is a species of crestfish in the family Lophotidae. It is an oceanodromous fish ranging from waters 0–92 meters deep, but may get stranded in shallow waters.
Akysis clavulus is a species of catfish belonging to the family Akysidae. The fish is endemic to Vietnam. The fish is able to grow up to 3.5 centimeters (SL).
Akysis clavulus is a species of fish belonging to the family Akysidae. The fish is found in northern Borneo and the Mekong River.
