 20 fish species were collected during four field trips in southeastern Brazil. Focal snorkeling observations of the fishes were made over a total of six hours. Hemogrammus marginatus, Roboids perinensis, hyphysobriacan ekez, astynax altopyranii, sarasalmus spiloplura, and brycanamericastriminius. This article was authored by El Casate, H. F. Mendez, and K. M. Ferrara.