“…Given this, it is possible to understand how animal development can be influenced by various environmental factors, sex and gonadal maturity, health status, populations and variations within species (Froese, 2006;Portella et al, 2021). Characiformes fish, for example, are capable to maintain their body size throughout their life cycle, which is why they tend to show isometric growth (Lizama and Ambrósio, 1999;Costa and Nunes, 2019;Urbanski et al, 2023) The allometric growth of fish can be evaluated in different production systems such as nurseries, cages and hapas. Hapas are flexible net tanks, easy to manage and low in cost when compared to conventional net tanks.…”