The Jackknife Fish (Equetus lanceolatus) is a species of marine ray-finned fish belonging to the family Sciaenidae, the drums and croakers. It is native to the western Atlantic Ocean.

Distribution and Habitat

The Jackknife Fish is native to the western Atlantic Ocean where its distribution extends along the eastern coasts of the Americas from the Carolinas in the United States to Brazil, including the Caribbean. It is mostly found along coasts in waters up to 60 meters deep, especially in reef habitat.

Physical Description

This fish reaches about 25 cm (10 in) in maximum length. The first dorsal fin is very tall. The body is gray in color with three brown or black bands. The first two bands are small and vertical, and the third extends from the tip of the tall dorsal fin down the body to the tip of the tail fin.

Diet and Feeding

This species feeds on small invertebrates and sometimes detritus. In captivity it should be fed a variety of meaty foods including brine shrimp, mysis shrimp, and prepared foods.

Behavior and Reproduction

The Jackknife Fish is peaceful and generally solitary. It can be bred in captivity. It is a shy species that prefers to hide during the day and becomes more active at night.

Aquarium Care

It requires a tank of at least 75 gallons with plenty of hiding spots and a sandy substrate. It is peaceful and should be kept with peaceful tankmates. It is considered reef-safe with caution. It can be bred in captivity.

Conservation Status

Classified as Least Concern by the IUCN Red List.