 The smalltail shark forms large aggregations segregated by sex, with the males generally found deeper than the females.It feeds mainly on bony fishes, including sea catfish, croakers, jacks, and grunts.Shrimp, crabs, and squid are secondary food sources, while adults are also capable of taking young sharpnose sharks ("Rhizoprionodon"), hammerhead sharks ("Sphyrna"), and stingrays ("Dasyatis").