[Harmless Teddy Bear]

Sharks are noted for eating everything they can get their teeth around including rolls of tar paper.

They would be considered the exception to the rule.

[Roccus]

In additipn to my #28, there is this from Wiki

In turn, bluefish are preyed upon by larger predators at all stages of their lifecycle. As juveniles, they fall victim to a wide variety of oceanic predators, including striped bass, larger bluefish, fluke (summer flounder), weakfish, tuna, sharks, rays, and dolphins.

I'm gonna assume that by "dolphin" they mean dorado, mahi-mahi (Coryphaena hippurus)
Oddly, I've seen young bluefish (snappers) toss up fluke fry.