Oblique Lined Dottyback - prob do some searches for who sells it in the first place -- all pseud can change sex so maybe order a c ouple small ones and see who changes
All dottybacks are hermaphrodites (Debelius & Baensch, 1994). Since each fish can adopt either male or female sexual organs, adding two like species into a tank together will result in a pair, provided they don't kill each other first. Unlike clownfish (another hermaphroditic group), the larger of the two dottybacks will be the male.