Giant purple sea slugs have been washing up in unusually high numbers on East Bay beaches and waterways this summer.
Some experts believe this may be caused by warmer temperatures near coastal waters.
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Residents in the California Bay Area have been alarmed after a small invasion of the giant purple sea slugs begun washing up on their beaches and at least one person called 911 thinking that the small ‘sea hare’ was a human organ.
The hermaphrodite sea slugs can weigh up to 15lbs and reach 30 inches long
Yahoo news reports:
These California sea hares are harmless plant eaters. But their big size and unusual abundance this year is turning heads at the shorelines in the cities of Crab Cove in Alameda and Miller Knox Regional Park in Richmond, as well as Lake Merritt in Oakland and Tomales Bay in Marin County, the Contra Costa Times reported Saturday.
“We are getting calls from the public asking what the heck is this big weird purple blob,” said Carolyn Jones, a spokeswoman for the East Bay Regional Park District. “It’s native to our area. It’s not endangered, but they are rarely seen other than an occasional one here or there.”
Officials have no precise count, but dozens have been seen on some beaches at the same time, and two dozen were spotted last month in an inlet to Lake Merritt in Oakland.
The first ones were spotted last fall. But more have been seen in May and June — including ones that captured the crowd’s attention last weekend at an annual sand castle-building contest at Crown Beach in Alameda.
The slugs can reach 15 pounds or more and 30 inches in length, although the ones in the East Bay are smaller — about the size of a large fist or a heart. They are called sea hares because their thick antennae resemble rabbit ears.
The boom in sea hares may be related to warmer temperatures near coastal waters, said Morgan Dill, a naturalist at the Crab Cove Visitor Center in Alameda. “We can’t say for sure why we’re seeing so many, but the Bay temperatures are definitely warmer this year,” Dill said.
In Oakland, local resident Joel Peter said he was stoked last month to see about 22 sea hares moving through in a canal into Lake Merritt.
“I had never seen one before, and then all of a sudden there were 22 of them with these brilliant colors,” Peter said. “They really caught my eye.”
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