As the as the largest species of parrotfish, a single individual of Bolbometopon muricatum can ingest over 5 tons of reef per year. That freaky looking bump is also for head butting rival males.
These are a giant humphead parrotfish: a species not regarded at risk of extinction, but one which has suffered severe decline. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of ...
(via BBC Earth) A school of Humphead Parrotfish descend on the coral reef to feed and turn the age old coral into a fine sand that, in turn, forms islands. Fascinating video from BBC natural history ...
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