part of start stage end stage artery pectoral artery zebrafish_anatomy subclavian artery TAO:0005086 ZFA:0005086 PA The pectoral (subclavian) arteries originate from the dorsal aorta and takes the blood outward into the fin from the paired portion of the dorsal aorta posterior to the last aortic arch <a href='http://zfin.org/zf_info/zfbook/stages/hatch.html'> Kimmel et al. 1993</a>. pectoral fin blood vessel hatching:pec-fin adult