Sharks eat each other quite often. Sharks can also be eaten by any larger fish - if the shark is young or quite small, a barracuda or grouper could eat it.
Sea lampreys are eaten by larger predators like sharks. However, the most common predator of these creatures are human beings.
Well sea creatures eat bigger or smaller creatures!
They feed on fish and other small sea creatures.
The hippo and prehistoric creatures
I heard that salmon eats plankton, which eats microscopic organisms, but I don't know anything further than that.
No because it eats plankton and microscopic sea creatures.
Parrot fish do and other sea creatures
The word 'omnivores' just means a creature that eats just about anything; i.e humans are omnivores unless you are vegetarian or similar.
Lets see, fish, calamari, shrimp, lots of stuff.
Yes, but all were eaten by fish and other sea creatures.
Some sea creatures have ansetors of dinosaurs
Birds such as sea gulls, small animals such as opossums, raccoons, and other small creatures.