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.

An outbreak of a toxin has left over 50 sea lions sick and stranded off the Malibu coast. At least 10 are currently in a treatment center.

MALIBU — An outbreak of domoic acid is sickening sea lions in the waters off Malibu, according to wildlife officials. Workers at the California Wildlife Center responded to at least 14 calls for sea lions in distress over a four-day period, the center said in a Facebook post on Saturday.