Crenicichla tapii Piálek, Dragová, Casciotta, Almirón & Říčan 2015

Relatively common only in the main channel of the Iguazú River, where they can be observed in schools on the flat-rock substrate from the walkways over the river grazing on periphyton. Always encountered in direct association with flat slab-like exposed rocky bottoms with epiphyte growths, never above gravel or soft sediment-covered bottoms. Grazes on periphyton (Ref. 104794).

Crenicichla tapii is a species of cichlid native to South America. It is found in the lower Iguazú River basin above the Iguazú Falls in Argentina. Distributional range extends upstream of the Misiones Province, Argentina into the neighboring state of Paraná, Brazil. This species reaches a length of 12 cm (4.7 in).