Volume 38, Plate XII / Ichthyology (Fish)

Dark Centrarchus

Centrarchus niger

Lacking notes, this dark Centrarchus measures six and three-quarter inches long by about three deep, the colour entirely a dark bluish black, paler beneath, with indigo blue on the belly, mouth edges, and opercular borders, and an orange-red iris. The dorsal carries seventeen spiny and ten soft rays without any spotting, while the ventral bears a strong round spine before its first soft ray, which much exceeds the others in length; taken in the Rio Negro in February.