Rachycentridae

The cobia (Rachycentron canadum) (, ) is a species of marine carangiform ray-finned fish, the only extant representative of the genus Rachycentron and the family Rachycentridae. Its other common names include black kingfish, black salmon, ling, lemonfish, crabeater, prodigal son, codfish, and black bonito.

Rachycentron is the only known member genus of the family Rachycentridae. The genus contains a single living species, the cobia (Rachycentron canadum), and the Late Miocene fossil species Rachycentron stremphaencus from Maryland.