Descripción: “...The proposed review was aimed at investigating the mechanisms of action of some of the most used immunostimulants, conceptualising their use in aquiculture and discussing recent work on the topic thereby forming the basis for proposing pertinent, feasible investigations for tackling some problems in the fish-farming health/sanitation area.Key words: aquiculture, disease, fish, health/sanitation, immune system.Resumo:  Os imunoestimulantes são principalmente elementos estruturais de microorganismos, que basam seu principio na estimulação do sistema imune inato, apresentando melhoramento do estado da saúde dos animais e maior resistência a patógenos. ...”