Sculpin uploaded here: https://www.inaturalist.org/observations/174291342
I've spotted Northern Star Coral in Menemsha before. It definately has its hard exterior. There were a few clumps of it this time. I've never seen the animal out of its skeleton in daytime. Sorry. I don't know the correct words for its anatomy.
Found this on Horseneck Beach in MA. Any idea what this is?
Really bad photo, but what type of algae is this?