Spine-cheeked anemonefish in Milne Bay, Papua New Guinea Jul 2, 2025

Spine-cheeked anemonefish in Milne Bay, Papua New Guinea

That bright fish hiding in the anemone? That"s the spine-cheeked anemonefish, or the maroon clownfish, and it is not just a cute creature. Native to the Indo-Pacific, from western Indonesia to Taiwan and the Great Barrier Reef, this species lives on the edges of coral reefs. It is easily distinguished by the spine extending from each cheek—hence the name. Groups of spine-cheeked anemonefish form around a single dominant female, and if she disappears, the top male steps up—literally changing sex to take her place. Spine-cheeked anemonefish thrive in warm, shallow waters and stick close to their chosen sea anemone.

© Fred Bavendam/Nature Picture Library

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