Fin's Fish Guide
The Blue rainbow (Scarus guacamaia) is a saltwater fish of the family Scaridae that grows up to 120 cm.
Description
The rainbow parrotfish is the largest parrotfish of the Atlantic and can reach about 120 cm. The species has a green body with orange tints and a beak of fused teeth, with which it rasps algae from coral and rock. It inhabits coral reefs; juveniles are strongly dependent on mangroves. The fish has a fixed home cave in which it rests at night and uses the sun to relocate it. Like many parrotfishes it changes sex, from female to male. Larger individuals can carry ciguatera toxin.
Frequently asked questions
How do you recognise the Blue rainbow?
The Blue rainbow has a torpedo-shaped body, is mainly multicoloured and shows a plain pattern. Largest parrotfish of the Atlantic Ocean; beak-like dentition; a fixed shelter cave; protogynous hermaphrodite. Note: in tropical areas this species can cause ciguatera poisoning when eaten; large specimens of coral reef predators can accumulate the toxin. Eat with caution or avoid in risk areas.
Where does the Blue rainbow live?
The Blue rainbow lives in the sea (marine waters) and is mostly found around stony or rocky ground. Western Atlantic, from Florida and the Bahamas to Venezuela.
How big does the Blue rainbow get?
The Blue rainbow grows to a maximum of about 120 cm. On average the species is around 70 cm.
Is the Blue rainbow dangerous to humans?
The Blue rainbow is venomous — handle spines with care and seek medical help after a sting if needed. Harmless to handle. In some areas there are reports of ciguatera poisoning after eating it, especially larger individuals: in case of symptoms such as tingling, nausea, vomiting or a reversed hot-cold sensation, seek medical help and keep any leftover material.
Is the Blue rainbow edible?
The Blue rainbow is rarely eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Scarus
More from the family Scaridae
Want the complete picture on the Blue rainbow?
Point your camera at the fish and Fin names the species in seconds. Free, and the Blue rainbow is one of 12,519 species in the app.