Fin's Fish Guide
The Lacandon sea catfish (Potamarius nelsoni) is a freshwater fish of the family Ariidae that grows up to 39 cm.
Description
Nelson's sea catfish is a sea catfish (Ariidae) from Central America. The species has an elongate, scaleless body with an adipose fin, barbels and stout pectoral and dorsal fin spines. It inhabits rivers of the Usumacinta system in southern Mexico and Guatemala. Like other sea catfishes the male broods the eggs in his mouth. Probing the bottom, it feeds on crustaceans, molluscs and small fishes. The stout fin spines carry venom; a sting is very painful.
Frequently asked questions
How do you recognise the Lacandon sea catfish?
The Lacandon sea catfish has an elongate, eel-like body, is mainly silver-grey and shows a plain pattern. The male is a mouthbrooder; sturdy fin spines carry venom and give a painful sting.
Where does the Lacandon sea catfish live?
The Lacandon sea catfish lives in fresh water and is mostly found around sand or mud bottom. Central America; rivers of the Usumacinta system.
How big does the Lacandon sea catfish get?
The Lacandon sea catfish grows to a maximum of about 39 cm.
Is the Lacandon sea catfish dangerous to humans?
The Lacandon sea catfish can cause injury; handle it with care. If stung by a fin spine: immerse the affected part in water as hot as can be tolerated (about 45 degrees C) to break down the venom, and seek medical care for severe or persistent symptoms.
Is the Lacandon sea catfish edible?
Yes, the Lacandon sea catfish is commonly eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
More from the family Ariidae
Want the complete picture on the Lacandon sea catfish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Lacandon sea catfish is one of 12,519 species in the app.