0 a type of large seal (= a mammal that eats fish and lives partly in the sea), found in the North Atlantic:
Grey seals breed in large groups that may contain hundreds of animals.
The grey seal of the North Atlantic Ocean breeds during the fall and winter.
The New Jersey coast is also home to gray seals, whose coats actually range from brown to jet black.
Declining shark stocks off eastern Canada may have promoted an increase in the grey seal population.
