The fleckfin dottyback, Pseudoplesiops wassi, is a species of dottyback fish. It is found associated with coral reefs and other rocky coastal habitats in a large part of the south-western Pacific including the Great Barrier Reef, the Coral Sea, the Caroline Islands, the Bismarck Archipelago, Vanuatu, Fiji, Rotuma, Tonga, Samoa, and the Solomon Islands.