part of develops from start stage end stage pectoral fin musculature adductor profundus zebrafish_anatomy adductors profundus ZFA:0000616 Small thin adductor muscle that is part of the pectoral fin. The origin of the adductor profundus lies along the developing anterior skeletal flange of the pectoral girdle. The adductor profundus develops from the primitive pectoral fin adductor. TAO:0000616 adductor muscle primitive pectoral fin adductor larval:days 7-13 adult