Clark's Anemonefish (Amphiprion clarkii), With wife behind, in the dark

Also known as Anemonefishes, Clownfishes, Clown Anemonefishes, Brown Anemonefish, Two-banded Anemonefish,Clark's Clownfish, Clarkii Clownfish, Clarkii Clown, Clarkii's Clown, Black Clark's Clownfish, Yellowtail Clownfish, Chocolate Clownfish, Black Clown and Sea Bee.

Found in pairs and family groups with their host anemone in lagoons, coastal and outer reefs. Colour variations.
They feed on zooplankton and algae.
Length - 12cm
Depth - 0-60m
Widespread Indo-West Pacific

Anemonefish are specialised damselfish and live a symbiotic relationship with various anemones. Some anemonefish will only be found with one type of anemone, but others can live with many types.
They are rarely found very far away from an anemone. This was a surprise to me!...