Complex sentence: It has been reported as far north as British Columbia, Canada, and as far south as Punta Asuncion, Baja California Sur, Mexico, and in addition to this in the Gulf of California and the Galapagos Islands.
Split into simpler sentences: It has been reported as far north as British Columbia, Canada, and as far south as Punta Asuncion, Baja California Sur, Mexico. In addition it is found in the Gulf of California and the Galapagos Islands.