Answer:
They swim around in schools or pods and they are related to whales
Often cooked as fillet, this meat comes from an animal that swims underwater.
I'm not a pet with long floppy ears I just share their name when a ship disappears. What am I?
In the fields a frightful thing. Watch it and you will find, it has a pitchfork in the front, and a broom back behind.
While I did live, I food did give, which many one did daily eat. Now being dead, you see they tread me under feet about the street.
In birth I spring forth, in life I unfold. In death I wilt and die, but rebirth restores all.