Fin's Fish Guide
The Halfmoon (Medialuna californiensis) is a saltwater fish of the family Kyphosidae that grows up to 48 cm.
Description
The halfmoon is a sea chub (Kyphosidae) from the eastern Pacific off the west coast of North America. The species has an oval, blue-black body with a deeply forked, half-moon-shaped tail, to which the name refers. It occurs in rocky areas and kelp forests, from the shore to about 40 m deep, often in schools. It grazes mainly on seaweed and also picks small invertebrates. It is a sport and food fish. The species is harmless to humans.
Frequently asked questions
How do you recognise the Halfmoon?
The Halfmoon has a torpedo-shaped body, is mainly blue and shows a plain pattern. Crescent-shaped tail; schooling seaweed grazer of rocks and kelp forests.
Where does the Halfmoon live?
The Halfmoon lives in the sea (marine waters) and is mostly found around sand or mud bottom. Eastern Pacific off North America; rocky areas and kelp forests.
How big does the Halfmoon get?
The Halfmoon grows to a maximum of about 48 cm.
Is the Halfmoon dangerous to humans?
No, the Halfmoon is harmless to humans. None required: this species is harmless to humans.
Is the Halfmoon edible?
Yes, the Halfmoon is commonly eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Medialuna
More from the family Kyphosidae
Want the complete picture on the Halfmoon?
Point your camera at the fish and Fin names the species in seconds. Free, and the Halfmoon is one of 12,519 species in the app.