Orcas, often called 'killer whales', with their striking black and white colouring and high dorsal fin, are easy to spot on a whale watching tour. The whales are the largest member of the dolphin family, often measuring 10m (32 feet) in length. Killer whales eat seals and have been known to attack other whales. They are fast swimmers and are thought to be highly intelligent. Orca sightings in Nova Scotia are rare.

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