Global fish production is estimated to have reached around 179 million tons in 2018, of which 156 million tons were destined for human consumption, or 20.5 kg per capita/year. Aquaculture was responsible for 46% of total production, and 52% of fish for human consumption (FAO -Food & Agriculture Organization of the United Nations, 2020). Thus, fish farming directly or indirectly generates millions of jobs and produces several species of fish.Tambaqui Colossoma macropomum (Cuvier, 1818), the second most cultivated fish species in Brazil, is also produced throughout the Amazon, due to its strong zootechnical performance in

The world population is estimated to reach close to 10 billion inhabitants by 2050, thus increasing the global demand for energy, drinking water and food (ONU, 2019). Given this scenario and the decline of natural fish stocks, aquaculture has been the subject of rapid development. Aquaculture has grown faster than other major food production sectors as it contributes to the supply of animal protein of high biological value for human consumption, job creation and income, thereby boosting the economic development of several countries (FAO, 2018).However, aquaculture activities around the world have suffered from outbreaks of parasitic diseases, which cause losses in production and affect profitability and sustainability (Assefa & Abunna, 2018).Losses in aquaculture caused by parasitic diseases are estimated at US $ 1.05-9.58 billion/years (Shinn et al., 2015). Losses from parasitic diseases are also attributed to stressful handling conditions, high stocking densities and inadequate water quality during the cultivation.Parasitic diseases in fish farming include those caused by monogeneans, which are ectoparasites with simple and direct life cycle.These ectoparasites can cause significant losses in farmed fish for