RMRP and Hyperglycemia: Crustacean hyperglycemic hormone (CHH) and DA were important for the control of the metabolism and osmoregulation in sub-adult shrimp Litopenaeus vannamei, and the DA could stimulate hyperglycemia through CHH released from the neuroendocrine XO–SG complex in the eyestalk (Camacho-Jiménez et al., 2017).