part of start stage end stage inferior caudal ventral flexor zebrafish_anatomy CVI ZFA:0000269 TAO:0000269 inferior ventral flexor flexor caudalis ventralis inferioris Paired, deep caudal fin muscles that arise from a narrow insertion site at the 28th and 29th vertebrae then project from the vertebral column to the ventral base of the caudal fin where they attach broadly to ventral caudal fin rays. flexor muscle deep caudal fin musculature unknown adult