Answer:
I am an animal named after the animal that I eat.
What can provide food before it is alive, while it is alive and after it's dead?
They swim around in schools or pods and they are related to whales
I live in the ocean but I am not a fish. I have eight arms and can change colors quickly. What am I?
I have a pouch like a kangaroo but I live in trees and eat eucalyptus leaves. What am I?
I love spinach.