The pores expanded significantly and retract if a hermit crawls on him, but otherwise not much. Definitely alive though, so we'll keep an eye. It was a very good day at the beach! We found what I can only assume are giant sea squirts, we got about 100 porcelain crabs, a maroon non photosynthetic nem, a large hermit with symbiotic nems at both sides (we found several and they all had them, we just didn't keep them all) and the nems are purple with electric orange filaments they put out when angry (IE when I found out there was a nem on the crab I was holding) two gorgonians, two blue legged hermits... I think there was more, but I lost track.