The marine iguana is one of the most extraordinary animals in the Galapagos Islands. Unlike any other lizard in the world, it has adapted to feed in the ocean, diving into cold coastal waters to graze on algae.
With their dark bodies, long tails, sharp claws, and rugged appearance, marine iguanas may look prehistoric. Their unusual appearance is the result of millions of years of evolution in the isolated Galapagos environment.
How Do Marine Iguanas Survive in the Ocean?
Three features are especially useful to look for during a shoreline walk. The flattened tail helps propel the animal through the water. Its claws provide a grip on coastal rocks while it feeds or moves through the surf. After time in a salty environment, specialized glands help it remove excess salt. Together, these traits make its daily routine possible in a place where land and sea meet.
You may find one lying almost motionless on dark volcanic rock after a feeding trip. That stillness makes the animal easy to overlook, so scan the shoreline carefully and follow the route set by your naturalist guide. Watching for several minutes can reveal small details: a change in position, a move toward the water, or the way its body blends into the surrounding lava.
An itinerary with coastal walks gives you a different perspective from one focused mainly on open-water activities. Ask which islands and visitor sites a trip includes, while remembering that wildlife sightings depend on conditions and cannot be guaranteed. When you do encounter one, stay on the path and avoid stepping between the animal and the sea.
Marine iguanas feed primarily on algae growing along rocky shores and in shallow marine environments. They can dive underwater to find food before returning to land to warm themselves in the sun.
Their bodies are specially adapted to this lifestyle. Their flattened tails help them swim, while their claws allow them to hold onto rocks in strong coastal currents. They also have specialized glands that help remove excess salt from their bodies.
Where Can You See Marine Iguanas in Galapagos?
Marine iguanas are widespread throughout the archipelago and can often be seen along rocky coastlines. They are found on islands including Isabela, Fernandina, Santa Cruz, and San Cristóbal, among others.
Fernandina and Isabela are particularly interesting destinations for travelers interested in Galapagos wildlife, while North Seymour can also provide unusual wildlife encounters along its shores.
A Wildlife Encounter Unique to Galapagos
Seeing a marine iguana resting on a black volcanic rock after feeding in the ocean is one of the experiences that makes a Galapagos cruise different from a conventional wildlife trip.
During a multi-island cruise, travelers can encounter marine iguanas in different environments while learning how these reptiles adapted to life in one of the world’s most isolated ecosystems.