Local NewsNews Red crabs wash up on Seal Beach By For the Sun - May 4, 2016 Facebook Twitter Google+ Pinterest WhatsApp Red crabs and seaweed wash ashore on Seal Beach. Photo by Rosadia Quiroz Small red crabs washed up on the sands of Seal Beach Wednesday morning, May 4. The red crabs have been seen—sometimes in large numbers—on California beaches for months now. The red crabs have seldom if ever visited Seal Beach. Download QR