Fin's Fish Guide
The Jackknife-fish (Equetus lanceolatus) is a saltwater fish of the family Sciaenidae that grows up to 25 cm.
Description
The jackknife-fish is a striking drum of the family Sciaenidae from the western Atlantic and Caribbean. The species grows to about 25 cm and has a white body with an ornate, curved black band running from the head through the very tall first dorsal fin into the tail, like a raised knife or banner. It lives on coral and rocky reefs, often solitarily or in pairs near ledges and caves. As a nocturnal bottom hunter it feeds on small crustaceans, worms and other bottom animals. The species is popular in the marine aquarium and is harmless to humans.
Frequently asked questions
How do you recognise the Jackknife-fish?
The Jackknife-fish has a flattened, disc-shaped body, is mainly white and shows a flame-patterned pattern. Graceful curved black band through the very tall first dorsal fin into the tail, like a raised knife. Note: in tropical areas this species can cause ciguatera poisoning when eaten; large specimens of coral reef predators can accumulate the toxin. Eat with caution or avoid in risk areas.
Where does the Jackknife-fish live?
The Jackknife-fish lives in the sea (marine waters) and is mostly found around stony or rocky ground. Western Atlantic and Caribbean; coral and rocky reefs.
How big does the Jackknife-fish get?
The Jackknife-fish grows to a maximum of about 25 cm.
Is the Jackknife-fish dangerous to humans?
No, the Jackknife-fish is harmless to humans. None required: this species is harmless to humans.
Is the Jackknife-fish edible?
The Jackknife-fish is not usually eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Equetus
More from the family Sciaenidae
Want the complete picture on the Jackknife-fish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Jackknife-fish is one of 12,519 species in the app.