Jax Sport Fishing. Year-round, you can charter a 29-foot custom boat through Jax Sport Fishing. Captain Michael has more than 20 years' experience in offshore fishing, and the catch of the day might include sailfish, blue marlin, white marlin, or mahimahi. Av. Adolfo Mateos 42, near lighthouse, Isla Mujeres, Quintana Roo, 77400. 998/877–1254 or 214/295–7104. www.jaxsportfishing.com. M$12713 per day.
Keen M International Blue Water Encounters. Captain Anthony Mendillo Jr. runs specialized fishing trips from December to June aboard several vessels, which range from 34 to 41 feet. Av. Arq. Carlos Lazo 1, Isla Mujeres, Quintana Roo, 77400. 998/877–0759. www.islamujeressportfishing.com. From M$14,970 per day.
Sea Hawk Divers. If you’re interested in either offshore or deep-sea fishing, try Sea Hawk Divers. It has trips daily from 9 am to 1 pm. Av. Arq. Carlos Lazo, near Playa Norte, Isla Mujeres, Quintana Roo, 77400. 998/877–1233. www.seahawkislamujeres.com. From M$4014.
Sociedad Cooperativa Turística. This fishermen's cooperative rents boats for a maximum of four hours and six people; tours to the underwater museum (lunch included) are also available. Contoy Pier, Av. Rueda Medina, Isla Mujeres, Quintana Roo, 77400. 998/887–0800. Boat rentals M$2676; tours M$602 per person.