Hormone found in the sinus gland of isopods and decapods which controls the blood sugar level. Has a secretagogue action over the amylase released from the midgut gland. May act as a stress hormone and may be involved in the control of molting and reproduction (By similarity). Produced by the medulla terminalis X-organ in the eyestalks and transported to the sinus gland where they are stored and released. Belongs to the arthropod CHH/MIH/GIH/VIH hormone family.