Cat-eLog Right Arrow Clariidae Right Arrow Clarias

  • Clarias batu
Jump to next section Cat-eLog Data Sheet
Scientific Name Clarias batu  Lim & Ng, 1999
Common Name
Type Locality Sungai Baharu, on right side of Tekek-Juara trail, towards Juara, Pulau Tioman, Pahang, Malaysia.
Pronunciation klar ee ass
Etymology Clarias: From the Greek chlaros, meaning lively; in reference to the ability of the fish to live for long periods out of water. 
Jump to next section Species Information
Size 305mm or 12" SL. Find near, nearer or same sized spp.
Identification Clarias species are characterized by having an elongated body; a soft rayed dorsal fin extending to, or nearly to, the caudal fin base; a soft rayed anal fin extending from just behind the anus to the caudal fin base; pectoral fins each with a serrated anterior bony spine; head depressed, covered largely by firmly sutured, surface sculptured bony plates forming a protective helmet; four pairs of flagellate barbels (nasals, maxillaries, inner and outer mandibulars); air breathing organs derived from the 2nd and 4th epibranchials within a superbranchial chamber.

Possess the following unique combination of character states: body slender, body depth at anus 9.0-11.4% in SL; distance of occipital process to dorsal fin origin 9.9-11.8% in SL; dorsal and anal fins separate from caudal fin.
Sexing The genital papilla, which is to the right of the anus as you look at the fish with its head to the left, is elongated and pointed in males while it is round and relatively larger (and larger than the anus) in females. In ventral view especially, females are much broader in the body than males of equal age and rearing practices.
Jump to next section Habitat Information
Distribution Asia: endemic to Pulau Tioman, Malaysia.
Pacific, Malaysia Waters, Pulau Tioman Island Waters (click on these areas to find other species found there)

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Jump to next section Husbandry Information
Feeding Largely carnivorous, subsisting on small fish, crustaceans and insects.
Furniture Found in freshwater sections of torrent streams, in clear, cool, fast flowing water over a substrate of sand, rocks and large granite boulders.
Suggested Tankmates Large cyprinids (silver sharks, tinfoil or spanner barbs for example) or Central American cichlids.
Breeding Unreported.
Breeding Reports There is no breeding report.
Jump to next section Further Information
Reference Raffles Bulletin of Zoology Suppl. No. 6, pp 157, Figs. 1, 2, 4a, 5a, 7.
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Last Update 2019 Sep 18 01:01 (species record created: 2006 Nov 25 12:00)