My latest obsession - tannic domes!

If you're looking for a cave with a lot of colour and some fun restrictions, Hatzutz Actun is your cave!

When you go to the Archipelago of Revillagigedo you want to see manta rays. A marine biology student recorded 330 different mantas in the archipelago in 3 years.

It's the manta rays that make The Boiler, San Benedicto, Mexico, one of the world's most famous dive sites.

One of our surprise visitors at the remote rock of Roca Partida was a baby humpback whale with its mother.

Roca Partida is the smallest island in the Revillagigedo Archipelago. It's 100 metres long and 8 metres wide; a piece of volcanic rock that has eroded over millennia.

Mexico's Revillagigedo Islands are a group of four volcanic islands in the Pacific Ocean.

As you arrive at San Benedicto in the Revillagigedo Islands, Silky sharks (Carcharhinus falciformis) come in to circle the boat.

The Silky shark (Carcharhinus falciformis) is one of the most common sharks at the Revillagigedo Islands.

Few people but New Zealand scuba divers will understand my fascination with a slightly boring silver fish with two white spots. Those who've been completely immersed in a school of Demoiselles, surrounded in all directions, fish so close you could cradle them in your hands, will get it.