part of start stage end stage superior caudal ventral flexor CVS TAO:0000455 Paired, deep caudal fin muscles that originate from the 30th vertebra then project from the vertebral column to the ventral base of the caudal fin where they attach broadly to ventral caudal fin rays. ZFA:0000455 ventral flexor zebrafish_anatomy flexor caudalis ventralis superioris flexor muscle deep caudal fin musculature unknown adult