A area of study in Ensenada de La Paz located in the southern part of Bahía La Paz, Baja California Sur, Mexico B both bodies of water are located on the southwest coast of the Gulf of California, Mexico C sampling sites and potential sources of dispersal of tunicates (circles) [FONATUR (Fidepaz) (24°07'3"N, 110°20'47"W), del Palmar (24°09'09"N, 110°19'39"W), Abaroa (24°09'11"N, 110°19'36"W), La Paz (24°09'17"N, 110°19'31"W), Cortéz (24°09'19"N, 110°19'26"W), Palmira (24°10'58"N, 110°18'09"W) and Costa Baja (24°13'07"N, 110°18'12"W)].