Thanks to reader, A Bear.
"Had some nice weather and it coincided with the herring spawn, so I took lots of photos over a couple of days of the commercial herring fishery. The turquoise tint in the water is caused by large schools of male herring releasing their milt (sperm). The females swim into the milt clouds and stick their eggs to the rocks and seaweed where they are fertilized... It is feeling like spring."