Marine iguanas are one of the marque endemic animals of the Galapagos, and today we spent the whole morning in Cape Douglas photographing them as they came into the sea to feed on the algal sea grass that is their staple diet. They lie in the sun in the morning trying to warm their bodies up to create enough energy to dive into the water and feed. Once they have swum to the sea bed they are almost in a trance like state and just concentrate on feeding, not worrying about anything else around them. They can hold their breath for up to fifteen minutes, then go back to lie in the sun and warm themselves up again.
We overweighted ourselves to help us stay down in the gentle surge and then hovered around five metres and went looking for them. As the morning progressed there were more and more in the water, in fact it was hard to avoid them as they clung to the rocks and munched away on the algae. They look like small dinosaurs and it was wonderful to be able to swim with them and capture this behaviour that I have seen on nature documentaries for years.