Answer:
I grunt and have a curly tail. People say I'm dirty but I'm actually very clean. What am I?
They swim around in schools or pods and they are related to whales
I am black and white with a fishy diet. I cannot fly but I'm an excellent swimmer. What am I?
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.
He calls in the morning, the day to renew, if his owner gets hungry, he'll be turned to stew. What is he?
Give it food and it will live, give it water and it will die.