 Recent research has placed "S.nigricans" in the monophyly Pomacentrinae, which is closely related to the other subfamilies Amphiprioninae and Chominae.Amphiprioninae are clown fish, which are differentiated from other organisms in their family by their bright orange and white coloration across the body and over fins and relationship with anemone.There is high variation in morph patter of Amphiprioninae, especially around their face.