Now that's a brood!

  

Meet Lisbeth's Brooding Sea Anemone (Epiactis lisbethae).  This is the first time I've encountered one in Sonoma County (or anywhere!).

In comparison to the more common Proliferating Anemone (Epiactis prolifera), note the very high abundance of juveniles ...and that the juveniles are uniform in size (rather than a large variety of sizes).  (For an example of a brooding Epiactis prolifera, check out the post called "Ring around the anemone" on 18 February 2021.)

Yes!  Those are tiny juvenile anemones clustered between the base of the anemone (on the left) and the tentacles (on the right).  Here's a close-up of the juveniles:

Photographed along the Sonoma Coast on 19 May 2022.