GO:0035912

The process in which the anatomical structures of the dorsal aorta are generated and organized. The dorsal aorta is a blood vessel in a single-pass circulatory system that carries oxygenated blood from the gills to the rest of the body. In a single-pass circulatory system blood passes once through the heart to supply the body once. [GOC:bf, GOC:dgh, UBERON:0005805, Wikipedia:Aorta, ZFIN:0000014]