Monkseal mom and pup

Most marine mammals are visitors outside Johnston Atoll and occasionally to lagoon waters. 

  • Bottlenose Dolphin

  • Cuvier’s Beaked Whale

    Cuvier’s Beaked Whales were sighted on numerous occasions in the early 1990s both within and outside the lagoon; there were no confirmed sightings of these rare whales in 1993, 1994, or 1995. A Cuvier’s Beaked Whale was observed calving off the south side of Johnston Island in 1995, but no additional sightings have been documented. 

  • Hawaiian Monk Seal

    Hawaiian Monk Seals feed on fish and crustaceans from the reef and lagoon and, although able to spend long periods at sea, often haul out on sandy beaches to bask in the sun.


  • Humpback Whale

  • Spinner Dolphin