The invention relates to a composition for aquaculture characterised in that it comprises alone or combined with other compounds or excipients at least one compound for the external protection of aquatic species. The invention also relates to a food composition for aquaculture. Both compositions can be used in the safe and effective treatment of ectoparasites in aquaculture and in the stimulation of growth in aquaculture. The invention also relates to a dipping bath for aquaculture for the treatment or prevention of ectoparasitosis and for the stimulation of growth.
