Tuna crabs are swarming off the coast of San Diego. Sometimes called 'red crabs,' they have quite a few nicknames and typically live in deeper waters near Mexico.
Tuna crabs are swarming San Diego beaches, waters cbs8.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from cbs8.com Daily Mail and Mail on Sunday newspapers.
Noticing some jelly-like, blue blobs on San Diego County's beaches lately? Those are none other than Velella velella, also known as "by-the-wind sailors" or.