The adult sea lions are being found just as rescue centers gear up for saving sea lion pups that typically are found struggling at this time of year.

When some algal blooms grow out of control, they can emit a neurotoxin that accumulates in small fish, like sardines and anchovies. When sea lions eat those fish, the toxin binds to their brain and heart. They can have seizures, tremors, vision issues and even cardiac problems.

Toxic algae bloom is being blamed for sickening several California sea lions in Malibu, Calif., according to a nonprofit wildlife rehabilitation center.