Not to mention that large fish kills aren't unheard of, and are increasing in frequency and scope as warming waters, pollution and over-fishing damage the ocean

Not to mention that large fish kills aren't unheard of, and are increasing in frequency and scope as warming waters, pollution and over-fishing damage the oceans and everything that lives in them. Look at what's left of coral reefs in places like Australia, and a bunch of dead sardines feels downright understandable.