For two nights we are anchored beside the tiny twin islets known as Tom Owens. There are reefs surrounding each islet and it is here that we plan to swim. The smaller is little bigger than a tennis court but has a fairy tale house completely covered in concha shells. The larger islet is about half the size of a football pitch and contains a small hotel and a dive centre.

The boat is anchored a couple of hundred metres off shore in a depth of two metres of clear water and manta rays and eagle rays swim around constantly.

The snorkeling here surpasses the previous day. We glide over gardens of multiple different types of coral. Everywhere there are exotic fish, their colours amplified by the sunlight the bursting through the water. There are tunnels and gorges here and there and in one, we see a puffer fish and in another, a lion fish is concealing itself in a tiny cave. These lion fish are undesirable invaders from Northern waters and are harmful to the coral. In fact there are a team of volunteers on one of the islets who are diving with spears to hunt them down. At one point, a (harmless) four foot nurse shark looms out of one canyon and gives us a curious look before moving slowly away in to the gloom.

Back at the boat more delicious food is produced and for dinner we have fresh lobster which Raoul, the dour captain has caught while snorkeling. All this washed down with Gin and tonic as the sun drops over the horizon.