Cypho purpurascens. the oblique-lined dottyback or the lavender dottyback is a species of ray finned fish from the family Pseudochromidae which occurs in the western Pacific. It occasionally makes its way into the aquarium trade. It grows to a size of 7.5cm (03inches) in length.[1] These fish live in pairs, or are solitary, in or in the vicinity of crevices in the reef and holes located in tidal pools, lagoons and on the reef slopes.[2]