The blackfin roughy (Hoplostethus melanopterus) is a slimehead of the order Beryciformes.

It has a very wide distribution across the Atlantic, Pacific, and Indian Oceans.

It can reach sizes of up to 14.0 cm (5.5 in) TL.

It is a deepwater fish, living between 454–1,500 m (1,490–4,921 ft) deep.

This Beryciformes-related article is a stub.