Threefin blenny

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Threefin blennies
Notoclinops caerulepunctus (Blue dot triplefin).jpg
Blue dot triplefin
Notoclinops caerulepunctus
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Blenniiformes
Family: Tripterygiidae
Whitley, 1931
Genera

See text

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".

Contents

With an elongated, typical blenny form, threefin blennies differ from their relatives by having a dorsal fin separated into three parts (hence the name); the first two are spinous. The small, slender pelvic fins are located underneath the throat and possess a single spine; the large anal fin may have one or two spines. The pectoral fins are greatly enlarged, and the tail fin is rounded. The New Zealand topknot, Notoclinus fenestratus, is the largest species at 20 cm in total length; most other species do not exceed 6 cm.

Many threefin blennies are brightly coloured, often for reasons of camouflage; these species are popular in the aquarium hobby. As demersal fish, threefin blennies spend most of their time on or near the bottom on coral and rocks. The fish are typically found in shallow, clear waters with sun exposure, such as lagoons and seaward reefs; nervous fish, they retreat to rock crevices at any perceived threat.

Threefin blennies are diurnal and territorial; many species exhibit sexual dichromatism, with the females drab compared to the males. The second dorsal fin is also extended in the males of some species. Small invertebrates comprise the bulk of the threefin blenny diet.

Genera

FishBase lists about 150 species in 30 genera:

Yellow-and-black triplefin
Forsterygion flavonigrum Fosterygion flavonigrum (Yellow & black triplefin).jpg
Yellow-and-black triplefin
Forsterygion flavonigrum
Blue-eyed triplefin
Notoclinops segmentatus Notoclinops segmentatus (Blue-eyed triplefin).jpg
Blue-eyed triplefin
Notoclinops segmentatus

Timeline

QuaternaryNeogenePaleogeneHolocenePleist.Plio.MioceneOligoceneEocenePaleoceneTripterygionQuaternaryNeogenePaleogeneHolocenePleist.Plio.MioceneOligoceneEocenePaleoceneThreefin blenny

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<i>Helcogramma</i>

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<i>Notoclinops</i>

Notoclinops is the name of a genus of triplefins in the family Tripterygiidae from New Zealand.

<i>Enneapterygius</i>

Enneapterygius is a genus of fish in the family Tripterygiidae found in the Indian and Pacific Ocean.

<i>Norfolkia</i>

Norfolkia is a genus of triplefins in the family Tripterygiidae. They are found I the Indo-Pacific region.

<i>Springerichthys</i>

Springerichthys is a genus of triplefins in the family Tripterygiidae. The two species in this genus are found in the western Pacific Ocean.

Microcanthinae

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<i>Enneapterygius mirabilis</i>

Enneapterygius mirabilis, the miracle triplefin, is a species of triplefin blenny in the genus Enneapterygius. It was described by Ronald Fricke in 1994 who gave it the specific name mirabilis, meaning "admirable", because its notable large pectoral fins and first dorsal fin were pretty.

Enneapterygius ventermaculus, the blotched triplefin or Pakistan triplefin, is a species of triplefin blenny in the genus Enneapterygius. It was described by Wouter Holleman in 1982.

Eastern jumping blenny

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Western jumping blenny

Lepidoblennius marmoratus, known commonly as the western jumping blenny, is a species of triplefin blenny in the genus Lepidoblennius. It was first described by William John Macleay in 1878.

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Norfolkia squamiceps, known commonly as the Scalyhead triplefin, is a species of triplefin blenny in the genus Norfolkia. It was described by Allan Riverstone McCulloch and Edgar Ravenswood Waite in 1916. Under the synonym Norfolkia lairdi it was the type species of Fowler's new genus. This species has been recorded from off Queensland, Norfolk Island, Lord Howe Island, New Caledonia and the Loyalty Islands. The adults occur in tidal pools among areas of coral reef.

Bidyanus welchi, commonly known as Welch's grunter, black bream, or silver bream, is a species of freshwater ray-finned fish from the family Terapontidae native to Australia.

References