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Unlike harbor seals, gray seals congregate in colonies to breed, most notably in Chatham and on Muskeget Island.
David L. Ryan/Globe Staff
A seal pup in Hull, which New England Aquarium staff rescued in February.
Adam Kennedy, a rescue biologist for the NewEngland Aquarium, walked past the grey seal pup.
New England Aquarium staff rescued the pup.
A grey seal pup on a beach in Hull in February.
Unlike whales and dolphins, seals are only semi-aquatic. In other words, it is perfectly natural for them to haul themselves onto shore.
Seals on Cape Cod’s Monomoy Island.
Julia Cumes for the Boston Globe
David Nash of Edgartown, a marine mammal volunteer for the New England Aquarium, at South Beach on Martha’s Vineyard, “I’m honored to be part of this network,’’ he says.
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