I've had these in my tank (unintentionally) for a little while but never paid much attention to them until a couple days ago when my wife started asking about them. I thought they were a mushroom coral but as I tried researching then, they look like a type of zoanthids, quite possibly a very toxic (?) type?? Any insight would be appreciated! Thanks! (By the way, they are much more brown than the yellowish color that they look in pictures)
