 One of the challenges that comes along with using facultative cleaners is that parasite removal from salmon must be maximized while also balancing additional nutrients from supplemented feed to ensure the health of the cleaner fish and the safety of the salmonid clients.Another challenge that arises in management of cleaner fish behaviour is balancing the number of cleaners to the number of clients.With a low cleaner-to-client ratio, the risk of lice infestation increases.