Spine cheek Anemonefish (Premnas biaculeatus), Manado Tua Island (Sulawesi, Indonesia)

The spine cheeck anemonefish  (Premnas biaculeatus) is the only anemonefish not belonging to the Amphiprion family. It lives strictly in couples male/female (where the biggest fish, the darker one, is the female), only inside the Entacmaea quadricolor sea anemone.


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