Enormous purple sea blobs invading California beaches, waterways

OAKLAND, Calif. -- Giant purple sea blobs are invading East Bay beaches and waterways. It's not a danger to the people but the slugs' big size is unusual.

They can reach up to 15 pounds and almost 3 feet in length.

Officials say the boom may be related to warmer water temperatures.

So far they've turned up at Lake Merritt in Oakland, Crab Cove in Alameda and Miller Knox Regional Park in Richmond.