Stomiidae

Black loosejaw

Malacosteus niger

Endemic Stomiid Fish of the Mediterranean Sea

• Black
• Circumpolar Arctic
• Southern Hemisphere
• Globally widespread
• Marine fish
• Polar regions
• Elongated
• Medium

Malacosteus niger, commonly known as the stoplight loosejaw, is a species of deep-sea fish. Some additional common names for this species include: northern stoplight loosejaw, lightless loosejaw, black loosejaw, and black hinged-head. It belongs to the family Stomiidae, or dragonfishes.