Answer:
They swim around in schools or pods and they are related to whales
This small creature kills even the largest one.
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.
I am slow and carry my house wherever I go but I am not a turtle. I leave a slimy trail behind me. What am I?
It's black and every time it speaks it says its name.
The strangest creature you'll ever find: Two eyes in front and many many more behind.