Gray whales do not have teeth. They have baleen plates that sift out tiny sea creatures (amphipods) called krill from the silty bottom of the ocean. They are filter feeders. It is so interesting that such a large creature eats such a tiny creature. It would be like us living on tiny shrimp the size of sesame seeds. No, the size of poppy seeds. We'd have to filter huge quantities of liquid to get enough of the tiny seeds to eat. They churn up the north pacific ocean bottoms sort of like roto-tilling flower beds... nutrients from the cold rich waters and oxygen get all mixed in making it a happy place for the krill to breed.
The baby whales (1 month old) are fantastically adorable with dimples which a hair or two will grow out of. Unlike their parents, they have no white barnacles attached to them yet. (usually)