Some of what lies beneath the waves in the shallows surrounding San Cristobal Island.

They need fresh water to breed, but there's nary a drop on most Galapagos Islands.

Two species of sea turtle graze the fields of algae along the shores of San Cristobal Island.

Punta Pitt on San Cristobal Island is the only place in the Galapagos where you can see all three species of boobies in one place.

The Galapagos are home to 24 ant species, four of them endemic, including the Galapagos Carpenter Ant found on San Cristobal Island.

Whitetip reef sharks are common in the shallow waters of the Galapagos, but there's little need to worry unless you're a fish.

Marine rays have an otherworldly appearance, a reminder of a time when evolution was still sorting out the basic body designs of life.

Whether a pair of lizards, a couple of Mexican hogfish or two men out behind the bar, animals often circle each other as they fight.

Sibling rivalries are serious - and deadly - for the chicks of some Boobies.