Palle von Huth and Ziva Lapidot, University of Haifa and Israel Oceanographic and Limnological Research, Haifa
A view down the mouth opening of a sea coral polyp. Tentacles covered with sting cells surround the opening. Some of the stinging arrows are visible as thin threads. Several tentacles also contain spherical cells of sea algae that live in symbiosis with the coral. Imaged with the new Nikon A1R confocal laser microscope at the University of Haifa, Faculty of Natural Sciences.