Grammonus opisthodon

Grammonus opisthodon, the bighead brotula, is a species of fish known from South Africa.

Description
This fish has an eel-like body with a rounded head. It is dark brown in colour with small brown spots on the head. The dorsal, anal and caudal fins are translucent and continuous with many fine rays. They have no spiny rays. The largest known specimen was 5 cm long.

Distribution and habitat
This fish is known from two nearby sites off the coast of the Eastern Cape of South Africa. It has been found at a depth of 22 m at Port Alfred and the Storms River Mouth.

Conservation
Only two specimens have been collected - one prior to 1934 and a second in the early 1980s.This species is currently listed as data deficient by the IUCN as very little is known about it.