0 a type of sea animal that has a simple body with tentacles (= long arms) and a single opening at the centre, for example a jellyfish -- jamochłon
At present, we have no information on the nature of the effector cells involved in graft rejection in sponges and coelenterates.
Symbiodinium, together with the nematocysts, are presumed to be derived from coelenterate prey.
Both groups unknowingly discovered that the same compound was used in both luminescent systems, however the name of the molecule was given after the coelenterate.
