The cownose ray's serrated spine is slimed with a toxic mucus at the end of the tail, as John Smith painfully discovered. Weighing 20-30 lbs. The adult females are believed to be pregnant again by the time they leave the Bay in late summer to overwinter off South America.
Rays feed on bottom-dwelling clams and worms.
Because rays disrupt the bottom while feeding, they're considered destructive to grass beds.