San Diego lifeguards were called to the Blacks Beach area after several people reported being stung by stingrays.
About a half a dozen people reported being stung just north of Citizen's Trail near the Gliderport around 4:30 p.m. Sunday.
Lifeguards told NBC 7 they had gotten a number of calls regarding stingrays on Sunday but did not have an official count.
Stingrays use their tails as self defense and are a common sight along San Diego's coasltine once the water gets above 50 degrees.
Lifeguards urge swimmers to shuffle their feet when entering and exiting the water to avoid stingrays.