Red Tide is a harmful algal bloom caused by a naturally occurring alga (a plant-like microorganism) called Karenia brevis or K. brevis. When K. brevis appears in large quantities – typically in the ...
A yellow-edged cadlina, a type of nudibranch or sea slug, is seen laying on the bottom of a tide pool at Fitzgerald Marine Reserve on the San Mateo County coast during an exceptionally low tide on Dec ...