“…The aforementioned spiegeldanio zebrafish mutant sheds some light on the aggression-exploration syndrome (Mustafa, Roman, et al, 2019 ; Mustafa, Thörnqvist, Roman, & Winberg, 2019 ; Norton et al, 2011 ; Norton & Bally-Cuif, 2012 ). As described above, spiegeldanio show increased aggressiveness in a mirror test (Mustafa, Thörnqvist, et al, 2019 ; Norton et al, 2011 ), an effect that has been attributed to population-level differences in histaminergic signaling; this aggressiveness does not translate into more success in dyadic fights, however, as fgfr1a mutant fish did not have any advantage in fights for social dominance, and agonistic behavior of these mutants did not differ from that of AB fish during dyadic interactions (Mustafa, Thörnqvist, et al, 2019 ). Thus, the aggression-exploration syndrome of fgfr1a mutants is not associated with social plasticity, the ability to rapidly switch between behaviors in response to changing social conditions (Taborsky & Oliveira, 2012 ).…”