| Ecological Descriptors
Body long and cylindrical with two dorsal fins and a subterminal mouth. Dark upper body and pale underside. A short bright yellow stripe, highlighted by black edging, runs from each eye to the level of the pectoral fins. Snout and nape may be paler.
Inhabits tube sponges, spending most of its time inside and not often seen on the outer surface. Found from 4 to 30m (13-100ft). It feeds on parasitic polychaete worms associated with sponges e.g. Haplosyllis spongicola.
(C) James Garin
(C) Jack Randall