caudal fin homocercal tail Type of tail fin in which the vertebrae generally turn upward at the hind end of the column, but which is externally symmetrical. The fin rays of the caudal are supported by hypaxial elements. UBERON:4200055 Found in most Teleostei. http://www.briancoad.com/dictionary/DicPics/homocercal2.htm T Alexander Dececchi