Abstract
Although the structural organization of the caudal neurosecretory system (CNSS) has been described in more than 450 teleosts, there are still no data available for tetraodontids. In the present paper, the morphological organization of the CNSS is described in two puffer fish, Tetraodon fluviatilis and T. palembangensis, by using a histological method selective for caudal secretion and oCRF/UI (ovine corticotropin‐releasing factor/urotensin I) im‐munohistochemical staining. In tetraodontids, the caudal spinal cord is reduced to a simple filum terminale, surrounded by a cauda equina. The present observations demonstrate that the CNSS is highly developed in these teleosts despite the fact they lack an ordinary caudal spinal cord.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
