Banded kokopu the dorsal and anal fins are positioned close to the tail fin, which is short and square. The caudal peduncle is short and deep, with thick fleshy flanges which join the tail fin. Adults are usually a dark, earthy brown or olive brown, with pale yellow vertical bands along the body. The belly is light coloured and unpatterned. Behind the operculum and above the pectoral fin is a silver or white mark, and sometimes a darker mark behind this. The bands either fade out top and bottom, or fork and crisscross the back of the fish. In small fish the
Caudal cell mass The cavities formed from the initial and secondary neuralation combine to form one uninterrupted cavity. There is still specualtion on the formation of the caudall cell mass in humans with arguments being made for it arising from many cavities or the continuing growth of the neurocele from the initial neuralation. The caudal cell mass will ultimately differentiate and form into many sacral structures such various nerve endings and the conus medullaris. The caudal cell mass plays a role in many diseases and abnomalities related to the spinal cord. One group of abnormalities it plays a role in are occult spinal