There’s growing concern over toxic algae blooms making sea lions dangerously aggressive while killing off other sea animals, with experts saying the algae is causing seizures, comas and even death in the marine mammals.

A 15-year-old in Long Beach, California, is recovering after a terrifying and unexpected ocean encounter with a sea lion that attacked her over the weekend.

Phoebe Beltran was in the home stretch of her 1,000-yard swim when she suddenly felt an intense pain as the sea lion bit her right arm.