Marine Iguana

Amblyrynchus Cristatus, Blunt snout- crested


Domain: Eukarote

Kingdom: Anamalia

Phylum: Chordata

Class: Reptilla

Order: Sguamata

Family: Iguaridae

Genus: Amblyrhynchus

Species: A. Cristatus


-Can grow up to 20lbs, and 4ft long

-Gets around by walking and swimming

-Half of the body length is the tail

-Darker toned skin to absorb sunlight and warm up

- Lighter colored skin around nose, because of the salt that they sneeze out.

-Flat tail and dorsal fin scales to help with swimming

-Long sharp claws allow for the iguana to grip onto rocks in the current

Habitat requirements: Needs to be in a close vicinity to water, where it goes to for food. Marine Iguana. They also need reefs near by, where their food source grows. Young Iguanas spend most of their time hiding in cracks and creases in the rocky shoreline.

Social Behavior: Marine Iguanas spend lots of time huddled in groups basking in the sun to absorb sunlight and heat themselves up. Marine iguanas may fight with each other, mostly during mating season to impress females.

Feeding Behaviors: Marine Iguanas usually eat red and green algae. They have blundt snouts that allow them to easily scrape algae off of the rocks. Marine Iguanas claws allow them to lock onto rocks in strong currents.


The marine iguana uses sexual reproduction. Males are ready to reproduce at age 8 and females at age 6.


The marine iguana was discovered by Charles Darwin in 1855. He described them as ugly or discusting.


The marine iguana was isolated on the Galapagos islands, they were not the only type of Iguana that was isolated on the island. Competition for food made it so that the Marine iguan took to the sea for food sources. Random point mutations are believed to be caused in accourdance with natural selection to change the marine iguana into a marine lizard.
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Three questions

-What adaptations do marine Iguanas have that allow them to be good swimmers?

-Why did marine iguanas take to the ocean?

-What did Marine iguanas evolve from?