Experts say frightening encounters with sea lions are becoming more common and the likely reason for recent attacks is a toxic algae bloom poisoning the marine mammals, leading to rare acts of aggression as they move to shallow waters and in closer proximity to beachgoers.

Marine experts say these attacks are not common, but are happening more often. That’s due to a toxic algae bloom that are poisoning marine mammals, making them become aggressive and violent as they travel to shallow water and get closer to humans.

The toxicity of this particular bloom seems to be a lot higher, ” said a marine biologist. “Animals are in worse shape than they have been in the past.”