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  • Bathyclarias nyasensis
Jump to next section Cat-eLog Data Sheet
Scientific NameBathyclarias nyasensis  (Worthington, 1933)
Common NameSapuwa
Type LocalityLake Malawi [Lake Nyasa], se. Africa.
Synonym(s)Clarias nyasensis, Dinotopterus nyasensis
Pronunciationbath ee klar ee ass.
EtymologyFrom the Greek bathys meaning deep and clarias also from the Greek chlaros, meaning lively; in reference to the ability of clarias to live for long periods out of water. 
Jump to next section Species Information
Size 1000mm or 39.4" SL. Find near, nearer or same sized spp.
IdentificationThe small, laterally placed eyes that bulge out from the outline of the head is a key characteristic for distinguishing Bathyclarias from Clarias.

B. nyasensis can be distinguished from the other species of Bathyclarias by having all of the following characters (adapted from Greenwood, 1961: 230):
1. Gill rakers long, length of longest gill raker (on outer arch) divided by length of longest gill filament = 0.7-1.0;
2. Body relatively slender;
3. Maxillary barbel contained 1.8-2.2 times in head length.
SexingThe 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
DistributionAfrica: Endemic to Lake Malawi.
African Waters, Zambesi, Malawi (click on these areas to find other species found there)
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IUCN Red List StatusLeast Concern
Jump to next section Husbandry Information
FeedingOccurs in open water and mainly filters zooplankton. Also feeds on small fishes and insect larvae.
Jump to next section Further Information
ReferencesProc. Zool. Soc. Lond. Pt. 2 308 Fig. 9
Registered KeepersNone.
Breeding ReportsNone.
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Last Update2013 Feb 06 09:13 (species record created: 2004 Apr 04 00:00)