Gudgeon is the common name for a number of small freshwater fish of the families Butidae, Cyprinidae, Eleotridae or Ptereleotridae. Most gudgeons are elongate, bottom-dwelling fish, many of which live in rapids and other fast moving water.
The slender weasel shark, Paragaleus randalli, is a weasel shark of the family Hemigaleidae. It is found in the western Indian Ocean, off Bahrain. It can grow up to a length of 48 cm.
Nemateleotris magnifica, known by a variety of common names including fire goby, magnificent fire fish, fire dartfish, or red fire goby, is a species of dartfish native to coral reefs of the Indian and Pacific oceans.
Ptereleotris hanae, commonly known as the blue gudgeon dartfish or blue hana goby, is a species of dartfish native to the western Pacific Ocean. It is a reef inhabitant, being found at depths of from 3 to 50 metres, though usually no shallower than 6 metres (20 ft). It inhabits burrows made by alpheid shrimp, but unlike the Amblyeleotris gobies who normally associate with these shrimp, this species has no interactions with their shrimp hosts. This species can reach a length of 12 centimetres (4.7 in) TL. It can also be found in the aquarium trade.
Ptereleotris evides, the Blackfin dartfish or scissortail goby, is a species of dartfish native to the Indian Ocean and the western Pacific Ocean. It is a reef inhabitant and can be found at depths of from 2 to 15 metres. This species can reach a length of 14 centimetres (5.5 in) TL. It can also be found in the aquarium trade.
Ptereleotris zebra, the Zebra barred dartfish, Chinese zebra goby, is a species of dartfish native to the Indian Ocean and the western Pacific Ocean. An inhabitant of reefs, it can be found in schools at depths of from 2 to 31 metres though usually no deeper than 4 metres (13 ft). This species can reach a length of 12 centimetres (4.7 in) SL. It can also be found in the aquarium trade.
Amblyeleotris randalli, Randall's prawn goby, is a marine benthic species of goby native to tropical reefs of the central Indo-Pacific. This species can also be found in the aquarium trade.
Alpheus randalli is a species of snapping shrimp in the family Alpheidae. It lives in the Marquesas Islands and parts of the Indian Ocean, including the Seychelles, in association with a goby of the genus Amblyeleotris. The shrimp is transparent or white with prominent red markings.
Ecsenius randalli is a species of combtooth blenny in the genus Ecsenius. It is found the western central Pacific ocean, around Indonesia. It can reach a maximum length of 2 centimetres. Blennies in this species feed primarily off of plants, including benthic algae and weeds. The specific name of this blenny honours the American ichthyologist John E. Randall of the Bishop Museum in Honolulu, who collected the type, photographed it and permitted Victor G. Springer to describe it.
Emblemariopsis randalli, the hornless blenny, is a species of chaenopsid blenny found in coral reefs around Cubagua, Venezuela, in the western central Atlantic ocean. It can reach a maximum length of 3.8 centimetres (1.5 in) TL. This species feeds primarily on zooplankton. The specific name honours the ichthyologist John Ernest Randall who collected the type specimens and provided them to Fernando Cervigón for him to describe.
Enneapterygius randalli, the Rapa triplefin, is a species of triplefin blenny in the genus Enneapterygius. It was described by Ronald Fricke in 1997. who honoured the American ichthyologist John Ernest Randall in its specific name, Randall collected many of the type series. This species is known only from French Polynesia where it is found off Rapa Iti and Marotiri in the southern Austral Islands.
Helcogramma randalli, Randall's triplefin, is a species of triplefin blenny in the genus Helcogramma. It was described by Jeffrey T. Williams and Jeffrey C. Howe in 2003 and named it in honour of the ichthyologist John Ernest Randall of the Bishop Museum in Honolulu who collected all of the known specimens. This species occurs in the western Pacific Ocean and is endemic to the islands of central Indonesia such as Bali, Lombok, Timor and Komodo.
Nemateleotris helfrichi, Helfrich's Dartfish, is a species of dartfish native to the Pacific Ocean.
John Ernest "Jack" Randall was an American ichthyologist and a leading authority on coral reef fishes. Randall described over 800 species and authored 11 books and over 900 scientific papers and popular articles. He spent most of his career working in Hawaii. He died in April 2020 at the age of 95.
Ptereleotris is a genus of dartfishes found in the Atlantic, Indian and Pacific oceans.
Nemipterus randalli, or Randall's threadfin bream, is a species of ray-finned fish from the family Nemipteridae, the threadfin breams, which is native to the western Indian Ocean and the Red Sea, it has invaded the eastern Mediterranean by Lessepsian migration through the Suez Canal.
Ptereleotris arabica is a species of dartfish in the family Microdesmidae.
Siganus randalli, the variegated spinefoot or Randall's rabbitfish, is a species of marine ray-finned fish, a rabbitfish belonging to the family Siganidae. It is found in the Western Pacific Ocean.
Ptereleotris microlepis is a species of the fish family Gobiidae. It is widely distributed in a variety of nearshore habitats of the Indian and Pacific Oceans.
Parapercis randalli is a species of fish in the sandperch family, Pinguipedidae. It is found in the north-western Pacific Ocean near southern Taiwan.
