I can't tell for sure, it is probably a sponge. maybe a sun coral. look it up.
I have had a successful 30 gal reef for several years now and wanted to start a 5 gal as an experiment. Long story short, I failed. Good luck.
I have had a successful 30 gal reef for several years now and wanted to start a 5 gal as an experiment. Long story short, I failed. Good luck.