no they look like yellow polyps, closely related to the zoanthid (but not a zoanthid) and are quite easy to take care of if you feed them every once and a while.
thanks for the info, i also recieved a new rock with about 50 small zoanthids on them,the last rock wasnt shipped well and there was a white slime growing all over them. did iodine dips and fresh water but with no luck, these new ones are great...