It looks like it could be a small rock flower anemone to me. If it’s a rock flower, I’m pretty sure it will not split. They spawn.
Is the rock live rock from Florida? One of my live rock batches (gulf live rock) came with two very small rock flower anemones.
Is the rock live rock from Florida? One of my live rock batches (gulf live rock) came with two very small rock flower anemones.