“These foragers dig in the sand, hunting shallow sand-dwelling animals like shrimp and crabs. Unlike most rays, blue spotted ribbontail rays will rarely bury themselves completely, though they sometimes will to ambush prey or when they migrate in large groups to shallow, sandy areas.
This is a species that prefers to be left alone and are far more likely to swim away from a fight. The blue spots are meant to tell predators and other animals to stay away. If cornered they can lash out with the poisoned barb on the end of their tails, and that venom can prove fatal to many species, including humans. (Source)
