Thalassoma amblycephalum, the blunt-headed wrasse, blue-headed wrasse, blue-headed zoe, moon wrasse, paddle-fin wrasse or two-tone wrasse,[1] is a species of wrasse native to the Indian Ocean and the western Pacific Ocean. It is a reef inhabitant, being found in schools at depths from 1to. This species can reach 16cm (06inches) in standard length. It can also be found in the aquarium trade.