part of start stage end stage vertebra ZFA:0001189 zebrafish_anatomy TAO:0001189 vertebrae All serially repeated ossified, cartilaginous, and ligamentous elements around the notochord (Schultze and Arratia, 1988). Adult zebrafish usually 32 vertebrae but may have as few as 30 to as many as 33 vertebrae. vertebral column endochondral bone larval:protruding-mouth adult