All lugubris complex crenicichla can be sexed since females have a white dorsal stripe. Wallaci complex can be sexed with females having a dorsal spot and a reddish belly when sexually mature. Saxatilis complex crenicichla can be sexed with females either having a dorsal spot, a red belly, and/or a white line in the dorsal fin. Crenicichla compressiceps can be sexed with males having striations in the anal fin. Acutirostris complex can only be sexed from venting.