Fungal infections have been shown to modulate host arginine metabolism via arginase (Wagener et al., 2017); therefore, we assessed arg2:GFP expression in two well-characterised fungal zebrafish infection models – C. albicans (Brothers and Wheeler, 2012) and C. neoformans (Bojarczuk et al., 2016). The gene discussed is ARG2; the disease is infection.