Threefin or triplefin blennies are blenniiforms, small percomorph marine fish of the family Tripterygiidae. Found in tropical and temperate waters of the Atlantic, Pacific and Indian Oceans, the family contains about 150 species in 30 genera. The family name derives from the Greek tripteros meaning "with three wings".
Enneapterygius is a genus of fish in the family Tripterygiidae found in the Indian and Pacific Ocean.
Enneanectes is a genus of triplefin fish in the family Tripterygiidae.
Springerichthys is a genus of triplefins in the family Tripterygiidae. The two species in this genus are found in the western Pacific Ocean.
The largemouth triplefin, Ucla xenogrammus, is a fish of the family Tripterygiidae and only member of the genus Ucla, found in the Pacific Ocean from Viet Nam, the Philippines, Palau and the Caroline Islands to Papua New Guinea, Australia, and the Solomon Islands, Fiji, Tonga, east to American Samoa and Rapa Iti, at depths of between 2 and 41 metres. Its length is up to about 47 millimetres (1.9 in). The generic name was coined by ichthyologist Richard Heinrich Rosenblatt in his unpublished dissertation of 1959 from the University of California Los Angeles and it is the initials of that institution, it was formally applied by Holleman in 1993.
The yellow triplefin ,> also known as the Abel's triplefin in South Africa, is a species of triplefin in the genus Enneapterygius. Males in this species can reach a maximum length of 2.5 centimetres. The blennies are generally bright yellow in colour, and males have black heads. They feed mostly on benthic invertebrates.
The blackbelly triplefin is a species of triplefin blenny in the genus Enneapterygius, described by German ichthyologist Ronald Fricke in 1997 and known from the western Pacific Ocean.
Helcogramma albimacula is a species of triplefin blenny in the genus Helcogramma. It was described by Jeffery T. Williams and Jeffrey C. Howe in 2003. This species is endemic to the Philippines.
Helcogramma alkamr is a species of triplefin blenny in the genus Helcogramma. It was described by Wouter Holleman in 2007. This species is found in the western Indian Ocean from the Comoros to the Seychelles, Mauritius and St Brandon. The specific name is derived for the Arabic name for Madagascar, where this species occurs, Jazirat al-Qumr.
Helcogramma billi is a species of triplefin blenny in the genus Helcogramma. It was described by Patricia E. Hadley Hansen in 1986, and the specific name honours the American ichthyologist Bill Smith-Vaniz, who collected the types Hadley Hansen examined when describing the species. This species is common on rock surfaces and beneath ledges in waters down to 10 metres (33 ft) in depth around the coasts of Sri Lanka.
The hooded triplefin is a species of triplefin blenny in the genus Helcogramma. It was described by Richard Rosenblatt in 1960. This species is widespread in the western Pacific Ocean from the Mariana Islands east to Samoa, Fiji and Tonga; it has been recorded from Sabah too.
The little hooded triplefin is a species of triplefin blenny in the genus Helcogramma. It was described by Richard Rosenblatt in 1960. This species is found in the Indo-Pacific from the Cocos (Keeling) Islands to the Society Islands in French Polynesia.
The red-eye threefin is a species of triplefin blenny in the genus Helcogramma. It was described by Albert William Herre in 1944 who honoured the Scottish naturalist and ethnologist Walter Elliot (1803-1897) in its specific name. This species occurs in the Indian Ocean along the eastern and western coasts of India and around Sri Lanka.
Helcogramma ememes is a species of triplefin blenny in the genus Helcogramma. It was described by Wouter Holleman in 2007 who used the initials of his mentor Margaret Mary Smith (1916-1987) of the J.L.B. Smith Institute of Ichthyology to create this species specific name. Smith and her husband, J.L.B. Smith, had collected many specimens of this blenny in the 1960s. This species is found in the western Indian Ocean along the coats of East Africa from the Bazaruto Islands in Mozambique to Malindi in Kenya, it is also found in the Comoro Islands, Mauritius and the Seychelles.
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.
Helcogramma rharhabe is a species of triplefin blenny in the genus Helcogramma. It was described by Wouter Holleman in 2007, the specific name the Xhosa chief Rharhabe who broke away from his main tribe and formed his own grouping named after him, the Rharhabe. This species is found in the western Indian Ocean, along the south eastern coast of Africa from the Transkei to the Bazaruto Archipelago.
Helcogramma springeri, known commonly as the Springer's triplefin, is a species of triplefin blenny in the genus Helcogramma. It was described by P.E. Hadley Hansen in 1986. The specific name honours the ichthyologist Victor G. Springer of the National Museum of Natural History. This species is found in the western Pacific Ocean from Indonesia and the Philippines to northern Australia, including the Great Barrier Reef.
Helcogramma steinitzi, known commonly as the red triplefin, is a species of triplefin blenny in the genus Helcogramma. It was described by Eugenie Clark in 1980. The specific name honours the marine biologist and herpetologist Heinz Steinitz (1909-1971) of the Hebrew University, Jerusalem. This species occurs in the north western Indian Ocean from the Red Sea to the Persian Gulf.
Helcogramma atauroensis, the red-anal triplefin, is a species of triplefin blenny in the genus Helcogramma. it was described by Ronald Frick and Mark V Erdmann in 2017. It occurs in the western Pacific on the coasts of Timor-Leste where it is associated with reefs down to 3 metres (9.8 ft).
Helcogramma ishigakiensis is a species of triplefin which is endemic to the Ryukyu Islands of southern Japan. It was described by Aoyagi in 1954 as Lepidoblennius marmoratus ishigakiensis. It was synonymised with Helcogramma inclinata by Ronald Fricke in 1997 but its status as a valid species was reasserted by Satokuni Tashiro in 2014. It is not included in FishBase but is in the Catalog of Fishes.
