Weird thing ID?

I cut this off a Fresh N Salty FB post, it looks pretty small as it's on a kayak deck but I've never seen anything like it. Anybody? they were at Dillons, yakking inside Tomales bay.

Looks like a small anemone, possibly Epiactis prolifera.

https://www.centralcoastbiodiversity.org/proliferating-anemone-bull-epiactis-prolifera.html

Thanks,

So proliferating anemones move around a bit? Aren't most common anemones firmly attached to their rock?

Yep, most anemones can move around a bit, but tend to stay in one place for long periods of time.  Some species move more than others.  There are few species that can even swim a bit, but most species move along like a snail, but slower.   They can also completely detach and let the currents push them around until they find a new place to hang out.

Here's a time lapse of an anemone in a tank moving around.

Yep, most anemones can move around a bit, but tend to stay in one place for long periods of time.  Some species move more than others.  There are few species that can even swim a bit, but most species move along like a snail, but slower.   They can also completely detach and let the currents push them around until they find a new place to hang out.

Here's a time lapse of an anemone in a tank moving around.

WHAT I had no idea

Yep, most anemones can move around a bit, but tend to stay in one place for long periods of time.  Some species move more than others.  There are few species that can even swim a bit, but most species move along like a snail, but slower.   They can also completely detach and let the currents push them around until they find a new place to hang out.

Here's a time lapse of an anemone in a tank moving around.

WHAT I had no idea

+1,
Thanks again, love listening to the experts.