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Humphead parrotfish

Marine life profile

Humphead parrotfish

Recorded at 3 dive sites

Where divers encounter it

Explore Humphead parrotfish around the world

The green humphead parrotfish (Bolbometopon muricatum) is the largest species of parrotfish, growing to lengths of 1.3 m (4.3 ft) and weighing up to 46 kg (101 lb), though some sources report a total length of 1.5 m (4 ft 11 in) and weight of 75 kg (165 lb). Groups graze hard reef surfaces, producing a crunch that divers may hear before seeing the fish.

Dive sites3
Countries3
Animal groupReef Fish
Safety profileGenerally Harmless

Meet the species

What to look for

How to Recognize It

A massive parrotfish with a steep forehead, heavy beak and deliberate, powerful movement over the reef.

How It Behaves

Groups graze hard reef surfaces, producing a crunch that divers may hear before seeing the fish.

Special Ability

Its reinforced beak removes tough algae and pieces of dead coral, converting reef rock into fine sediment.

Dive responsibly

Share the water well

How to Approach

Move slowly at the same depth, avoid swimming directly at it and let the fish resume its normal behavior.

Safety

Usually safe to observe at a respectful distance. Never feed, corner or touch a fish, especially near nests or cleaning stations.

Worth knowing

The detail you remember

Interesting Facts

A single large individual can process an extraordinary amount of reef material during a day of feeding.

Where to Find

Look around coral structure, rocky reef, wrecks and current lines where shelter and food meet.

Known countries

IndonesiaIndiaMaldives