Mazatlan is a Mecca for sun and fun seekers. It is a city of beautiful sunsets, bathed by the sea, encircled by cliffs, islands and beaches. A tourist center par excellence; it is also the most important commercial port on Mexico's west coast and the home base for Mexico's shrimping fleet. Shrimp from Mazatlan's waters are so large, measuring more than eight inches in length, that they are know…