New setup tank (reefer 250) purchased tank and dry rock and live sand from LFS. One of the dry rocks doesn’t look so dry to me and has something growing on it. They look tubular with a bulb shaped top part. They also move around with the flow so they appear gelatinous. The same rock also has what appears to be a macro algae growing on it. Any help is appreciated, LFS is trying to convince me it’s coral but I’m not convinced.

