This was an adult female about to be eaten by a Heermann's Gull. It was aged and sexed by the large masses of orange eggs on its underside (not visible in this picture).
San Diego County, California, US
Being eaten by a Sanderling
Struggling to right itself after a wave receded.
Female with eggs.
Emerita analoga, the Pacific sand crab or Pacific mole crab, is a species of small, sand-burrowing decapod crustacean found living in the sand along the temperate western coasts of America. It is found on exposed sandy beaches in the swash region of the intertidal zone.