Fin's Fish Guide
The Batfish (Aluterus monoceros) is a saltwater fish of the family Monacanthidae that grows up to 76 cm.
Worldwide in tropical and subtropical seas; near reefs and in open water.
Description
The unicorn leatherjacket is a filefish of the family Monacanthidae found worldwide in warm seas. The species has a deep, strongly laterally compressed, silvery-grey to brownish body and reaches about 76 cm. Characteristic is the first dorsal fin, consisting of a single long, erect spine on the head. Adults live solitarily or in small groups, sometimes near steep reef drop-offs, while juveniles are pelagic under floating objects and jellyfish. The species is commercially fished and eaten. It is harmless to humans.
Frequently asked questions
How do you recognise the Batfish?
The Batfish has a flattened, disc-shaped body, is mainly silver-grey and shows a plain pattern. First dorsal fin as a single long, erect spine on the head; juveniles live pelagically among jellyfish. Note: in tropical areas this species can cause ciguatera poisoning when eaten; large specimens of coral reef predators can accumulate the toxin. Eat with care or avoid in risk areas.
Where does the Batfish live?
The Batfish lives in the sea (marine waters) and is mostly found around stony or rocky ground. Worldwide in tropical and subtropical seas; near reefs and in open water.
How big does the Batfish get?
The Batfish grows to a maximum of about 76 cm. On average the species is around 40 cm.
Is the Batfish dangerous to humans?
The Batfish is venomous — handle spines with care and seek medical help after a sting if needed. None required: this species is harmless to humans.
Is the Batfish edible?
Yes, the Batfish is commonly eaten.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Aluterus
More from the family Monacanthidae
Want the complete picture on the Batfish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Batfish is one of 12,519 species in the app.