Fin's Fish Guide
The Giant damselfish (Microspathodon dorsalis) is a saltwater fish of the family Pomacentridae that grows up to 31 cm.
Eastern Pacific; rocky reefs from the Gulf of California to Malpelo (Colombia), incl. Galápagos.
Description
The giant damselfish is one of the largest damselfishes, of the family Pomacentridae from the eastern Pacific. The species grows to about 31 cm and has a stocky, dark-blue to black body; juveniles are brighter with blue shining spots and a yellow tail. Adults inhabit rocky reefs below the surf zone. As a predominantly herbivorous fish it grazes filamentous algae from the rocks and fiercely defends a territory with its algal patch, supplemented with small invertebrates. The species is strongly territorial but harmless to humans.
Frequently asked questions
How do you recognise the Giant damselfish?
The Giant damselfish has a flattened, disc-shaped body, is mainly blue and shows a plain pattern. One of the largest damselfishes; juveniles with shiny blue spots and a yellow tail, fiercely territorial algae grazer.
Where does the Giant damselfish live?
The Giant damselfish lives in the sea (marine waters) and is mostly found around stony or rocky ground. Eastern Pacific; rocky reefs from the Gulf of California to Malpelo (Colombia), incl. Galápagos.
How big does the Giant damselfish get?
The Giant damselfish grows to a maximum of about 31 cm.
Is the Giant damselfish dangerous to humans?
No, the Giant damselfish is harmless to humans. None required: this species is harmless to humans.
Is the Giant damselfish edible?
The Giant damselfish 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 Microspathodon
More from the family Pomacentridae
Want the complete picture on the Giant damselfish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Giant damselfish is one of 12,519 species in the app.