Three West Coast Bigg's killer whales (Orcinus orca) — a mother and two of her offspring — swim together in Cowlitz Bay off Waldron Island in the San Juan Islands of Washington state. West Coast Bigg's killer whales were formerly known as transient killer whales as they are constantly on the move over a vast range that extends from Alaska to Northern California. They are genetically distinct from resident orcas in the Salish Sea and also travel and work in much smaller groups, usually just a mother and her offspring.
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