Fin's Fish Guide
The Jansen's wrasse (Thalassoma jansenii) is a saltwater fish of the family Labridae that grows up to 20 cm.
Description
Jansen's wrasse is a colourful wrasse from the Indo-West Pacific. The species grows to about 20 cm and has a striking black-and-white banded body with yellow accents, especially on the tail. It lives actively among coral and rubble on shallow reefs to about 15 metres depth. Like many wrasses it is a protogynous hermaphrodite: fish start as females and can later become males. It feeds on small crustaceans and other invertebrates. The IUCN assesses it as Least Concern (LC).
Frequently asked questions
How do you recognise the Jansen's wrasse?
The Jansen's wrasse has a torpedo-shaped body, is mainly black and shows a vertical stripes pattern. Black-and-white banded body with yellow accents; protogynous hermaphrodite
Where does the Jansen's wrasse live?
The Jansen's wrasse lives in the sea (marine waters) and is mostly found around stony or rocky ground. Indo-West Pacific
How big does the Jansen's wrasse get?
The Jansen's wrasse grows to a maximum of about 20 cm.
Is the Jansen's wrasse dangerous to humans?
No, the Jansen's wrasse 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.
Is the Jansen's wrasse edible?
The Jansen's wrasse is not usually eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Thalassoma
More from the family Labridae
Want the complete picture on the Jansen's wrasse?
Point your camera at the fish and Fin names the species in seconds. Free, and the Jansen's wrasse is one of 12,519 species in the app.