Harbor seals have short, dog-like snouts. The color of each seal’s fur varies but there are two basic patterns: light tan, silver, or blue-gray with dark speckling or spots, and a dark background with light rings. Harbor seals molt (shed hair) in the mid to late summer for 1-2 months, spending more time out of the water. The harbor seal’s diet consists mainly of fish, shellfish, and crustaceans. Harbor seals complete both shallow and deep dives while hunting, depending on the availability of prey. They can sleep underwater and come up for air once every 30 minutes.