Scientific Name: Coryphelina exoptata
Common Name: Exquisite Coryphelina (unofficial), Aeolid Nudibranch

Adult Size: 10 – 25 mm
Depth Range: 5 – 30 m; most common on coral reefs with hydroid growth
Biotope / Habitat: Usually found on rocky or coral substrates where hydroids are abundant. This species often hides among the branches of its prey, making it difficult to spot until it moves
Diet: Carnivorous; feeds primarily on hydroids. Its cerata store stinging cells (nematocysts) from its prey for defense
Reproduction: Simultaneous hermaphrodite; mates by aligning their bodies to exchange sperm. Lays delicate, ribbon-like egg masses on hard substrates near hydroid colonies
Fun Fact: The vibrant purple, orange, and translucent tones of Coryphelina exoptata make it look almost unreal underwater. Despite its bright colours, it blends in surprisingly well with hydroids, which is why divers often overlook it even when it’s right in front of them.

Graceful, tiny, and intensely colourful, Coryphelina exoptata is a dream for macro photographers. Its shimmering cerata and elegant shape turn any close-up shot into pure underwater magic.