Fin's Fish Guide
The Hudson's triplefin (Helcogramma hudsoni) is a saltwater fish of the family Tripterygiidae that grows up to 4 cm.
Oceania: American Samoa, Solomon Is., Fiji, Indonesia, Japan, Ryukyu Is. and others
Description
The Hudson's triplefin is a triplefin (Tripterygiidae) from shallow reef and rocky water of the Indo-West Pacific. The species grows to about 4 cm and has a slender, spindle-shaped body with the family's characteristic three separate dorsal fins and high-set eyes; males colour up more brightly in the breeding season. As a day-active bottom-dweller it perches on coral, rock and weed and picks small crustaceans, algae and biofilm. The fish is harmless to humans.
Frequently asked questions
How do you recognise the Hudson's triplefin?
The Hudson's triplefin has an elongate, eel-like body, is mainly brown and shows a spots pattern.
Where does the Hudson's triplefin live?
The Hudson's triplefin lives in the sea (marine waters) and is mostly found around stony or rocky ground. Oceania: American Samoa, Solomon Is., Fiji, Indonesia, Japan, Ryukyu Is. and others
How big does the Hudson's triplefin get?
The Hudson's triplefin grows to a maximum of about 4 cm.
Is the Hudson's triplefin dangerous to humans?
No, the Hudson's triplefin is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Helcogramma
More from the family Tripterygiidae
Want the complete picture on the Hudson's triplefin?
Point your camera at the fish and Fin names the species in seconds. Free, and the Hudson's triplefin is one of 12,519 species in the app.