CRH and post-traumatic stress disorder: Zebrafish express homologues of numerous clinically recognized PTSD-associated molecular targets, including components of the glutamatergic and GABAergic systems, the (anti)oxidative stress system, receptors for 5-HT, DA, and NE, brain-derived neurotrophic factor (BDNF), corticotropin-releasing factor (CRF), catechol-O-methyltransferase, neuropeptide Y, calcineurin, among others [6,193,202,203,204].