Dive-site story
Situated in the Mona Passage off Puerto Rico's western coast, this uninhabited national wildlife refuge features dramatic volcanic seascapes and exceptional water clarity. Submerged canyons, swim-through caves, and boulder fields shelter dense coral formations isolated from coastal runoff. Because landing on the island is strictly prohibited, all diving takes place from charter vessels navigating the open-ocean channel.
Extensive underwater cavern systems and archways carved from volcanic rock
Pristine offshore hard coral gardens and barrel sponges unaffected by mainland runoff
Frequent encounters with open-ocean pelagics alongside resident reef species
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Late spring through summer offers the calmest seas and easiest boat crossings from Rincón or Aguadilla.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hawksbill Sea TurtleEretmochelys imbricata | Common | ||||||||||||
| Nurse SharkGinglymostoma cirratum | Common | ||||||||||||
| Spotted Eagle RayAetobatus narinari | Seasonal | ||||||||||||
| French AngelfishPomacanthus paru | Common | ||||||||||||
| Great BarracudaSphyraena barracuda | Common |
Marine forecast
