Capra,-M.F.; Cameron,-J.; Flowers,-A.E.; Coombe,-I.F.; Blanton,-C.G.; Hahn,-S.T. The effects of ciguatoxin on teleosts. PROCEEDINGS-OF-THE-SIXTH-INTERNATIONAL-CORAL- REEF-SYMPOSIUM,-TOWNSVILLE,-AUSTRALIA,-8th-12th-AUGUST- 1988.-VOLUME-3:-CONTRIBUTED-PAPERS-MINI-SYMPOSIUM-11-16- TO-22. Choat,-J.H.;Barnes,-D.;Borowitzka,-M.A.;et-al.- eds.. 1988. pp. 37-41. Ciguatoxin (CTX) has been the subject of pharmacological research in mammals, yet there has been no comprehensive work to determine why fish remain apparently resistant to this toxin. Neurophysiological studies on the nerves of the potential carrier fish Plectropomus sp. have shown a response to CTX similar to that of mammalian nerves. Two species of reef dwelling pomacentrids, Pomacentrus wardi and Chromis nitida , were injected intraperitoneally with varying doses of CTX. Both species were more resistant to the toxin than are mammals.