Animal Species:Clark's Threefin, Trinorfolkia clarkei (Morton, 1888)

Clark's Threefin is endemic to Australia. Its colouration varies with its habitat. It can be grey, brown, orange or yellow.

Clark's Threefins mating

Sascha Schulz © Sascha Schulz

Standard Common Name

Clark's Threefin

Alternative Name/s

Clark's Triplefin, Common Threefin, Macleay's Threefin, Rock Blenny

Identification

The Clark's Threefin is a moderately elongate fish with an almost cylindrical body. The dorsal fin comprises three parts, the first and second are spiny, but the third consists of soft rays.

The colouration of this species varies with its habitat. It can be grey, brown, orange or yellow, often with seven darker bars above. A distinct bar is always present below the eye. The first dorsal fin often has a dark spot.

Size range

The species grows to 8 cm in length.

Distribution

It is endemic to Australia, occurring in shallow coastal and estuarine waters from northern New South Wales, around the temperate south of the country including Tasmania, to south-western Western Australia.

The map below shows the Australian distribution of the species based on public sightings and specimens in Australian Museums. Click on the map for detailed information.  Source: Atlas of Living Australia.

Trinorfolkia clarkei

Distribution by collection data

Ozcam map of Clark's Threefin specimens in the Australian Museum.

What does this mean?

Classification

Species:
clarkei
Genus:
Trinorfolkia
Family:
Tripterygiidae
Order:
Perciformes
Class:
Actinopterygii
Subphylum:
Vertebrata
Phylum:
Chordata
Kingdom:
Animalia

What does this mean?

References

  1. Edgar, G.J. 1997. Australian Marine Life: the plants and animals of temperate waters. Reed Books. Pp. 544 (as Norfolkia clarkei).
  2. Kuiter, R.H. in Gomon, M.F., Glover, C.J.M. & R.H. Kuiter (Eds). 1994. The Fishes of Australia's South Coast. State Print, Adelaide. Pp. 992 (as Norfolkia clarkei).
  3. Hutchins, B. & R. Swainston. 1986. Sea Fishes of Southern Australia. Complete Field Guide for Anglers and Divers. Swainston Publishing. Pp. 180 (as Norfolkia clarkei).
  4. Kuiter, R.H. 1996. Guide to Sea Fishes of Australia. New Holland. Pp. 433 (as Norfolkia clarkei).
  5. Kuiter, R.H. 2000. Coastal Fishes of South-eastern Australia. Gary Allen. Pp. 437 (as Norfolkia clarkei).


Mark McGrouther , Collection Manager, Ichthyology
Last Updated:

Tags Fishes, Ichthyology, Clark's Threefin, Trinorfolkia-clarkei, Tripterygiidae, brown, green, black, yellow, orange, 'normal fish', < 10 cm, stripes or bands, intertidal, marine, adult,