Originally Posted by DaveRobinson
would this be considered a root veg of the sea??
cos that lists gonna grow even more and push my experimenting budget beyond bounds i will strugle with
Those are small the size of a nail, they are an invertebrate filter feeder, looks like a mix of algae+sponge they feed on plankton and they are static, in the aquarium shop’s they sell big ones and the common name is sea apple but they not static.