Pineal Organ

• It is situated near the pituitary. In-spite of being a photoreceptor organ the pineal organ shows endocrine nature of doubtful function.
• Removal of pineal from Lebistes species causes reduced growth rate, anomalies in the skeleton, pituitary, thyroid and corpuscles of Stannius.
• It has been reported that thyroid and pituitary glands influence the secretion of pineal.

Urophysis:

• Urophysis is a small oval body, present in the terminal part of spinal cord
• It is an organ deposits, which releases materials produced in the neurosecretory cells situated in the spinal cord.
• Urophysis extract shows ability to contract smooth muscles of ovary and oviduct of guppy (Poecilia reticulata) and the sperm duct of goby (Gillichthys mirabilis), suggesting the possibility of involvement in reproduction and spawning.