Fin's Fish Guide
The Blacktail triplefin (Enneapterygius nigricauda) is a saltwater fish of the family Tripterygiidae that grows up to 3 cm.
Oceania: American Samoa, Taiwan/Ch Taipei, Tahiti, French Polynesia, Kiribati, Guam and others
Description
The Blacktail 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 Blacktail triplefin?
The Blacktail triplefin has an elongate, eel-like body, is mainly brown and shows a spots pattern.
Where does the Blacktail triplefin live?
The Blacktail triplefin lives in the sea (marine waters) and is mostly found around stony or rocky ground. Oceania: American Samoa, Taiwan/Ch Taipei, Tahiti, French Polynesia, Kiribati, Guam and others
How big does the Blacktail triplefin get?
The Blacktail triplefin grows to a maximum of about 3 cm.
Is the Blacktail triplefin dangerous to humans?
No, the Blacktail 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.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Enneapterygius
More from the family Tripterygiidae
Want the complete picture on the Blacktail triplefin?
Point your camera at the fish and Fin names the species in seconds. Free, and the Blacktail triplefin is one of 12,519 species in the app.