Bodega Marine Reserve research coordinator Jackie Sones has worked in or walked on the rocky shores of the North Coast almost every day for the last 15 years. But while she was surveying the reserve for sea stars in mid-June, she saw something new: strips of bleached algae draped across the rocks, like frost, and a swath of dead mussels, hundreds or maybe thousands of them, black shells agape, orange tissue shining in the sun, stretching across 500 feet of rocky tidepools. 

“It’s one of the first things you see, coming down the rocks into the middle of the intertidal zone,” she said. “They were very visibly dead.”

In all her time in Bodega Bay, she wrote in her blog The Natural History of Bodega Head, she’d never seen a mussel die-off that size, or affecting so many individual mussels. 

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