[b4its2late]

I thought the oceanic ecosystem is under attack, as in out of balance, due to the mass killing of sharks for their fins.

[cogitator]

I thought the oceanic ecosystem is under attack, as in out of balance, due to the mass killing of sharks for their fins.

That doesn't help. There are several instances (wolves in Yellowstone is another) that show when top predators are eliminated or substantially reduced, entire ecosystems are altered.

Wolves are rebalancing Yellowstone ecosystem