The name of the Dos Sombreros dive site is after the shape of the surface rocks which break the surface looking much like the Mexican hats.
Whilst diving here you never quite know what to expect, I have descended into a group of over 50 mobula swimming directly underneath us. It was a pretty impressive site.
The topography is mainly rock and rubble but often when I was searching carefully on the sponges there were seahorses hiding out.
Electric rays are common at certain times of the year and seem to have a nursery as many young ones can be seen with just one spot central in the body, rather than the many developed later.
The most unforgettable experience I had on this site was hearing humpback whales singing for the first time. The sound does travel a long way but was clear and unique making all of our group smile in amazement.
The Author: Debbie Woods is a PADI and SSI Master instructor with 6000 dives accross 4 continents.