Fin's Fish Guide
The Louse fish (Phtheirichthys lineatus) is a saltwater fish of the family Echeneidae that grows up to 76 cm.
Description
The slender suckerfish is a remora (Echeneidae) from the open ocean. The species has an elongate body with an oval sucking disc on the head, a modified dorsal fin, with which it attaches to larger animals. It attaches most often to barracudas, but also to other large fishes and sea turtles, and is carried along. It eats food scraps and parasites from its host. The species is harmless to humans.
Frequently asked questions
How do you recognise the Louse fish?
The Louse fish has an elongate, eel-like body, is mainly brown and shows a horizontal stripes pattern. Adhesive disc on the head (a modified dorsal fin); lets itself be carried along by barracudas and other large animals.
Where does the Louse fish live?
The Louse fish lives in the sea (marine waters) and is mostly found around open water. Open ocean; attached to large fishes.
How big does the Louse fish get?
The Louse fish grows to a maximum of about 76 cm.
Is the Louse fish dangerous to humans?
No, the Louse fish is harmless to humans. None required: this species is harmless to humans.
Is the Louse fish edible?
The Louse fish is not usually eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
More from the family Echeneidae
Want the complete picture on the Louse fish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Louse fish is one of 12,519 species in the app.