Whether it's a whale breaching, a sea otter eating a clam, or a harbor seal resting on the beach, spotting a sea mammal is a special treat. Along Lake Clark's coast, marine mammals use haulout sites and feeding areas. Observed most frequently are harbor seals, beluga whales, Steller’s sea lions, and harbor porpoises. Peak harbor seal numbers can reach 200-280 in mid-summer. Groups of over 100 beluga whales are occasionally sighted. Few sea otters have been sighted in the park’s bays and coves but are known to be common in adjacent areas of Cook Inlet. More information on Alaska's sea mammals can be found at the National Marine Mammal Laboratory's Alaska Fisheries Science Center or the State of Alaska's wildlife notebook page.