Sea lion eating fish
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Video: The sea lions washing up on beaches in California

13 April 2013 Last updated at 10:44 BST

Huge numbers of hungry sea lion pups have been swimming to shore in California in the US.

Hundreds of the malnourished pups are being kept under close supervision and fed large amounts of fish to recover.

Scientists are trying to work out what's causing the problem.

Check out the video at the top of the page to see the sea lions.