What is gravy seals?

As an AI language model, I am not aware of "gravy seals". However, if you meant "gray seals" also known as Atlantic seals, these are large marine mammals commonly found in the coastal regions of the North Atlantic Ocean. They are known for their distinctive gray fur and can weigh up to 800 pounds. Gray seals are carnivorous and feed on fish, squid, and crustaceans. They are important members of the marine ecosystem, helping to regulate populations of their prey species. Gray seals are also hunted for their fur and oil, although hunting of these animals is now heavily regulated in order to protect their populations.