08/21/2023
A few pictures I took from 3 different subspecies of Amblyrhynchus cristatus :
A. c. hassi from Santa Cruz.
A. c. albemarlensis from Isabela, larger in size than hassi, longer face horns and longer crest spikes.
A. c. venustissimus from Floreana. Incredible pink/rusty colorations, specially in males. In breeding season, November-January they are even more colorful.
Marine iguanas are the only lizards truly adapted to live in the sea. I saw some in very isolated rocks, miles away from their main island, where the ocean has very strong currents and massive waves (last two pictures is one of the isolated rocks where I saw a couple).
They have very strong and sharp claws that helps them grab and walk through the rocks underwater, and a very powerful tail to swim and to help keep balance with the strong ocean currents.
They can dive deeper than 90 feet, and hold their breath for around 30 minutes if needed.
They feed mostly on algae that grow along rocky shores.
Since they feed underwater they ingest a large amount of saltwater. They have evolved specialized glands that remove salt from their blood. To avoid dehydration they sneeze out the salt from their nostrils without expelling water.