Occurs in a wide
range of habitats, from shallow lagoons to outer reef
slopes. Feeds on bottom fish, bivalves, crabs and shrimp.
Ovoviviparous. Found singly or in aggregates and usually
with jacks and cobia swimming near them. Not normally
aggressive, but it has been responsible for at least one
human fatality. Sought by surf and ski boat anglers in
southern Africa, but usually released unharmed. Longevity
record for a specimen in an aquarium is 81 days. May reach
disc width in excess of 3 m.