The Coast Guard rescued three family members who were stranded on Naushon, a sparsely populated island off Martha’s Vineyard. One was in critical condition.

Federal immigration agents were greeted by protests Thursday in the San Francisco Bay Area on their way out to a century-old, government-owned artificial island that houses a U.S. Coast Guard base. U.

The island off mainland Australia experiences the event every summer, when around 50 million crabs scuttle down from their homes to the beach to lay eggs.