on the underside of rocks in the jetty at a minus low tide
Sample from 20th st storm drain barrier in lake merritt, which has been unusually stinky over the past month as if sewage or something very nutrient rich has been flowing down this pipe. I've never seen these large filamentous mats before at lake merritt in recent years. All images takewith Bio-Rad's ZOE fluorescent imager
We observed quite a few live mussels and hundreds of empty shells. Some of the mussels, like this one, appeared to be retreating toward mid-channel in the receding late summer flows.
Bivalvia is a class of marine and freshwater molluscs with laterally compressed bodies enclosed by a shell in two hinged parts. Bivalves include clams, oysters, mussels, scallops, and numerous other families of shells. The majority are filter feeders and have no head or radula. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment on the seabed, where they are safe from predation. Others lie on the sea...