Polyamblyodon gibbosum

Polyamblyodon gibbosum (Cristie) is a species of marine fish in the Seabream family (family Sparidae) of order Perciformes. It is native to the east coast of Southern Africa.

Polyamblyodon gibbosum
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Sparidae
Genus: Polyamblyodon
Species:
P. gibbosum
Binomial name
Polyamblyodon gibbosum
(Pellegrin, 1914)

Description

Robust, moderately deep body with a steep forehead and slightly protruding snout. Strongly defined lateral line and long pectoral fins.[2]

The colour is an overall blue-grey, with dusky to pale yellow fins.[2]

Attains 60 cm. Common length 35 cm.[3]

Diagnostics

The dorsal fin has 11 spines, followed by 12 rays. The anal fin has 3 spines and 11 rays. There are 16 to 19 gill rakers on the first gill arch. The lateral line has 77 to 78 scales. There are 2.5 times the body depth in the standard length.[4]

Taxonomy

Synonyms
  • Pachymetopon gibbosus Pellegrin, 1914
  • Polyamblyodon cristiceps Smith, 1940

Common names
  • Cristie [2]
  • Knife-back Seabream

Etymology

Latin gibbosum = humped

Distribution and habitat

Known only from KwaZulu-Natal to central Mozambique and Madagascar. Common on Aliwal shoal and Sodwana reefs. Offshore coral and rocky reefs from shallow to 30m, but not in the surf zone. Forms loose feeding shoals over reefs.[2] Little is known about the biology and population status. The species is not targeted to any great extent, and it is found in MPAs.[1]

Diet

Feeds on zooplankton.[2]

References
  1. Mann, B.Q., Buxton, C.D., Russell, B., Pollard, D., Carpenter, K.E. & Sadovy, Y. 2014. Polyamblyodon gibbosum. The IUCN Red List of Threatened Species 2014: e.T170196A1291075. doi:10.2305/IUCN.UK.2014-3.RLTS.T170196A1291075.en. Downloaded on 20 May 2016.
  2. King, Dennis; Fraser, Valda (2014). The Reef Guide. Struik Nature. ISBN 978 1 77584 018 3.
  3. Froese, Rainer and Pauly, Daniel, eds. (2016). "Polyamblydon gibbosum" in FishBase. 01 2016 version.
  4. Smith, J.L.B., 1977. The Sea Fishes of Southern Africa. 5th ed. 4th imp,Valiant publishers LTD. ISBN 0 86884 029 7
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