Malacoctenus Sudensis (Malacoctenus sudensis) is a ray-finned fish of the family Labrisomidae. It inhabits marine (saltwater) waters in benthic environments. With a trophic level of 3.4, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.
Number of symphysial pores in Malacoctenus zonifer and Malacoctenus sudensis increases with size, but more pores are present in M. zonifer at any given size. M sudensis differs from Malacoctenus zonifer by the following characters: gill rakers 10-13, usually 11-12 (vs. 9-12, usually 10-11) and total anal-fin elements 20-23, usually 22 (vs. 19-22, usually 21-22). Several aspects of coloration are better developed in M. sudensis where it has dark pigment on the interspinal membrane of the first dorsal fin, spots on the gular fold, two spots ventrally on the opercle and spots on the anal fin of males, all of which are lacking or weakly expressed in M. zonifer .
Behavioural data for Malacoctenus Sudensis is currently being reviewed.
Marine; demersal. Tropical Pacific Ocean: from Nicaragua to Ecuador.
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