Host susceptibility to Cryptocaryon sp infection of Mediterranean marine broodfish held under intensive culture conditions: a case report

The detrimental effect of Cryptocaryon irritans exhibiting a host specifici ty on several marine fish broodstock is described in this study. The parasi te caused considerable mortalities on gilthead seabream, Sparus aurata, com mon dentex, Dentex dentex, and greater amberjack, Seriola dumerili, while r ed porgy, Pagrus pagrus, white sea bream, Diplodus sargus, sea bass, Dicent rarchus labrax, and sharpsnout sea bream, Diplodus puntazzo, remained unaff ected. Chemical treatments were not found to be effective against the inten se parasitosis and only extended, rapid and repeated hyposalinity measures seemed to minimise fish losses.