Whale shark silhouetted from underneath against the surface.

Whale shark inspecting a banca boat.

Whale shark is the largest fish in the world. Photoed here near the surface with a scuba diver.

Whale sharks can grow well over 10 meters long and weigh over 20 tons.

Whale shark is a plankton eater. It is no threat to divers.

It's a big tail...

Scuba diver posing for pictures...

And here's the result of the diver's photo op. Click the image to see the whole picture.

Three whale sharks.

Kwok posing with a whale shark on sidemount configuration.

A scuba diver with a technical diving configuration with manifolded twin set.

Turtle with remora.

Scuba diver at a shallow reef

Close-up of a turtle with scuba diver.

Barrel corals

Diving with doubles does not require a specific certification as such. Most technical diving courses use twin tank set-up by default.

Pink anemonefish from the clownfish family.