California beaches swarm with stingrays amid marine heatwave

Southern California beaches are experiencing a surge in stingray encounters, with a marine heatwave driving an unprecedented number of the creatures to shore. Lifeguard data reveals over 3,100 stingray incidents at Bolsa Chica and Huntington State Beach this year alone, a figure that has already doubled the total from the previous year. San Diego has also reported more than 900 stings by the end of June, marking a substantial increase compared to prior years.

Marine biologists explain that stingrays typically move closer to shore in warmer, calmer waters. The current marine heatwave, confirmed by the NOAA to be affecting a large stretch of coastal waters for an extended period, is creating ideal conditions for this behavior. Experts predict this El Niño event, expected to be historically strong, will bring even more stingrays from the south towards the coast, potentially leading to record numbers.

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Therefore, we expect record numbers this year.

Compounding the issue, populations of stingray predators such as sharks, sea lions, and groupers have reportedly shrunk in recent years. This ecological shift has allowed stingray populations to grow, contributing to their increased presence near shore. Researchers recently encountered around 200 stingrays, each as large as a dinner plate, at Seal Beach, with some observers noting they can cover the seabed.

To mitigate stings, lifeguards advise beachgoers to shuffle their feet when entering the water. This movement often startles stingrays, prompting them to move away rather than strike. While most stings do not require extensive medical attention, persistent redness and swelling lasting more than four to five days may warrant further care.

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It happens that they literally cover the seabed, so you can no longer see the sand.