Symphurus trewavasae

Common Name

Trewava's Tonguefish

Year Described

Chabanaud, 1948


Dorsal Fin Rays: 88-94
Anal Fin Rays: 73-79
Pectoral Fin Rays: none
Pelvic Fin Rays: 4
Caudal Fin Rays: 10
Longitudinal Scale Rows: 67-77
Vertebrae: 47-51
Pterygiophore pattern (1st three interneural spaces): usually 1-3-3, sometimes 1-4-2 and 1-3-2

Other diagnostic characters include: pupillary operculum absent, no scales on blind side dorsal/anal fin rays, no fleshy ridge on ocular side lower jaw, teeth only present on the anterior half of the premaxilla, teeth on entire margin of dentary, membrane ostia absent, 4 hypurals, 31-37 transverse scale rows, and 15-20 post-orbital scales (Munroe, 1998).


Pale to medium brown with 3-7 distinct dark crossbands on the body posterior to the head. An indistinct band on the head is often present. Opercle lighly pigmented. Peritoneum unpigmented. Fins with light brown pigment (no spots or blotches), darker toward tips of rays. Caudal region without blotch, pigmented like body. Blind side cream.


Specimens range from 50-139mm in length with sexually mature individuals over 70mm.


Continental shelf from 7-179m. but more common at moderate depths (40-80m.). An offshore species.

Range Map

 Range Map


Southeastern Brazil to central Argentina


Munroe, T.A. 1998. Systematics and ecology of western Atlantic tonguefishes (Symphurus: Cynoglossidae: Pleuronectiformes). Fish. Bull. 96(1):1-182.