Fin's Fish Guide
The Dark Tonguefish (Symphurus nigrescens) is a saltwater fish of the family Cynoglossidae that grows up to 12 cm.
Description
The dark tonguefish is a small tonguefish from the eastern Atlantic and the Mediterranean Sea. The species grows to about 12 cm and has the typical, strongly asymmetric flatfish body with both eyes on one side and a dark, brownish colour. As a bottom-dweller it lives on soft sandy and muddy bottoms of the deeper continental shelf and feeds on small benthic invertebrates. The fish is harmless to humans and is assessed as Least Concern (LC) by the IUCN.
Frequently asked questions
How do you recognise the Dark Tonguefish?
The Dark Tonguefish has an elongate, eel-like body, is mainly brown and shows a plain pattern. Asymmetrical dark flatfish body; inhabitant of the deeper shelf
Where does the Dark Tonguefish live?
The Dark Tonguefish lives in the sea (marine waters) and is mostly found around sand or mud bottom. Eastern Atlantic and Mediterranean Sea
How big does the Dark Tonguefish get?
The Dark Tonguefish grows to a maximum of about 12 cm.
Is the Dark Tonguefish dangerous to humans?
No, the Dark Tonguefish is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
Is the Dark Tonguefish edible?
The Dark Tonguefish is not usually eaten.
More photos
Easily confused with
These species look like the Dark Tonguefish and live in the same waters.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Symphurus
More from the family Cynoglossidae
Want the complete picture on the Dark Tonguefish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Dark Tonguefish is one of 12,519 species in the app.