Hormones normally found in vertebrates have been identified in nerve net tissues.[9] Whether they serve the same function as those found in vertebrates isn't known and little research has been performed to solve the question. Hormones such as steroids, neuropeptides, indolamines, and other iodinated organic compounds have been seen in tissues of cnidarians. These hormones play a role in multiple pathways in vertebrae neurophysiology and endocrine system including reward and complex biochemical stimulation pathways for regulation of lipid synthesis or similar sex steroids.[2]