the fact that autografts (host tissue applied to the same host) resulted in the fusion of the tissues, while allografts (different donor tissue from the same species) resulted in rapid loss of tissue in the immediate contact area in 7-9 days confirms that corals do have an immunological response; but is poorly known;
p.379-380; in ....
Mullen K.M., Peters E.C., Harvel C.D.; 2004; Coral Resistance to Disease; in Rosenberg E., Loya Y. (eds); Coral Health and Disease; Springer Verlag, Berlin/Heidelberg - FRG;