In San Pedro CA there's a beach called White Point Park, named for the mats of white sulfur oxidizing bacteria that grow in geothermal spring water. A Japanese family ran a bath house with the water from a geothermal spring but an earthquake damaged the flow and then being sent to internment camps ended it. I was gazing in the tide pools there when I got a whiff of sulfur, like at a hot spring, and followed my nose to a tide pool full of white fuzzy sulfur oxidizing bacteria (I think).
My pic: https://photos.app.goo.gl/1SfckUMzt4Qp5Ymy5
divers: https://www.youtube.com/watch?v=06bvGXtmcMI
https://pubmed.ncbi.nlm.nih.gov/27512390/
history: http://blogs.dailybreeze.com/history/2010/06/02/white-point-...