Fin's Fish Guide
The Blue-lined butterfly (Chaetodon fremblii) is a saltwater fish of the family Chaetodontidae that grows up to 13 cm.
Description
The bluestripe butterflyfish is a butterflyfish (Chaetodontidae) endemic to the Hawaiian archipelago. The species has a yellow body with oblique blue stripes, a black spot near the nape and no eye band, which makes it unmistakable. It lives on rocky and coral-rich reefs, often into deeper water. As an omnivore it picks the tentacles of tubeworms, small invertebrates and algae. It lives solitary or in pairs. The species is harmless to humans.
Frequently asked questions
How do you recognise the Blue-lined butterfly?
The Blue-lined butterfly has a flattened, disc-shaped body, is mainly yellow-gold and shows a horizontal stripes pattern. Yellow with oblique blue streaks, without an eye band; endemic Hawaiian butterflyfish.
Where does the Blue-lined butterfly live?
The Blue-lined butterfly lives in the sea (marine waters) and is mostly found around stony or rocky ground. Endemic to the Hawaiian archipelago; rocky and coral-rich reefs.
How big does the Blue-lined butterfly get?
The Blue-lined butterfly grows to a maximum of about 13 cm.
Is the Blue-lined butterfly dangerous to humans?
No, the Blue-lined butterfly is harmless to humans. None required: this species is harmless to humans.
Is the Blue-lined butterfly edible?
The Blue-lined butterfly is not usually eaten.
More photos
Want the complete picture on the Blue-lined butterfly?
Point your camera at the fish and Fin names the species in seconds. Free, and the Blue-lined butterfly is one of 12,519 species in the app.
All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Chaetodon
More from the family Chaetodontidae
Want the complete picture on the Blue-lined butterfly?
Point your camera at the fish and Fin names the species in seconds. Free, and the Blue-lined butterfly is one of 12,519 species in the app.