This is a photo of the gut contents of what invasive peacock groupers (known as roi) eat off of local reefs. Recent efforts by local divers resulted in a concerted effort to remove these invasive fish to protect our reefs. Off of the Kohala coast.
One of the signs from a recent roi eradication dive off the Kohala coast. The roi were introduced by the state for the purpose of shallow-water gamefishing but have proved to be a disaster for Hawaii's reefs.