Rypticus saponaceus (Bloch & Schneider, 1801)
Greater soapfish
Rypticus saponaceus
photo by Randall, J.E.

Family:  Grammistidae (Soapfishes)
Max. size:  35 cm TL (male/unsexed)
Environment:  reef-associated; marine; depth range 1 - 70 m
Distribution:  Western Atlantic: Bermuda and southern Florida, USA to Brazil. Eastern Atlantic: Mauritania to Angola, including St. Paul's Rocks (Ref. 13121), Cape Verde, St. Helena and Ascension islands. One record from Cape of Good Hope, South Africa (Ref. 7320).
Diagnosis:  Dorsal spines (total): 3-3; Dorsal soft rays (total): 23-25. Pale spots about the size of the pupil or smaller on body and some on dorsal fin (Ref. 13442).
Biology:  Maximum depth from Ref. 126840. A solitary species (Ref. 26340) inhabiting shallow water on bottoms with eroded limestone or mixed sand and rocks, as well as around reefs. Often found lying motionless against rocks (Ref. 13121). Secretes copious mucus which makes its surface slimy and when disturbed the slime turns into a soapy foam. The mucus has been shown to contain a toxic protein (Ref. 3632). Nocturnal, frequently seen around the bases of coral colonies and near mouths of caves (Ref. 26938).
IUCN Red List Status: Least Concern (LC); Date assessed: 23 August 2012 Ref. (130435)
Threat to humans:  other


Source and more info: www.fishbase.org. For personal, classroom, and other internal use only. Not for publication.