A similarly attenuated course was described for zebrafish lacking pex2, pex13 or the VLCFA transporter abcd1 (mutated in X-linked adrenoleukodystrophy), all of which reached adulthood yet showed VLCFA accumulation, fatty-liver pathology, locomotor impairment, and/or infertility (Strachan et al., 2017; Takashima et al., 2021; Demers et al., 2023). This evidence concerns the gene ABCD1 and X-linked adrenoleukodystrophy.