This elongated shape helps the fish to obtain its main source of food - other fishes, mainly Astyanax fasciatus .
(This elongated shape; helps; to obtain its main source of food - other fishes) (the fish; to obtain; its main source of food - other fishes)
This elongated shape the fish
helps to obtain
to obtain its main source of food - other fishes
its main source of food - other fishes