Marine Iguana
⚡ Key Facts & Quick Answers (AEO Summary)
- Taxonomic Class: Reptiles (Reptilia)
- Dietary Niche: Herbivore (Marine algae, seaweed)
- Max Speed: 10 km/h (6 mph) swimming
- Adult Weight: 1 - 12 kg (2.2 - 26 lbs)
- Typical Lifespan: 10 - 15 years
- Primary Habitat: Rocky shorelines, volcanic beaches, shallow intertidal reefs
- Native Region: Galapagos Islands (Ecuador)
- IUCN Red List: Vulnerable
📊 Physical & Biological Metrics
🧬 Scientific Taxonomy & Biological Classification
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Reptilia |
| Order | Squamata |
| Family | Iguanidae |
| Genus | Amblyrhynchus |
| Species Binomial | Amblyrhynchus cristatus |
📖 1. Species Overview
The Marine Iguana is the only modern lizard that dives in the ocean. Evolved specifically for marine life, they graze on subaquatic algae along volcanic shores in the Galapagos.
🦿 2. Physical Appearance, Anatomy & Adaptations
Features a stocky body, grey-black coloration to absorb heat, sharp claws to grip underwater rocks, and a flat paddle-like tail.
🗺️ 3. Habitat, Geographic Distribution & Territorial Range
Ectothermic reptiles that must bask on volcanic rocks to warm up before and after cold ocean dives.
🥩 4. Diet, Feeding Strategy & Hunting Tactics
Cling to underwater rocks to scrape off marine algae using their short, blunt snouts and sharp teeth.
🐣 5. Reproduction, Lifecycle & Social Hierarchy
Lay 1-6 eggs in sandy nests. Young iguanas are vulnerable to snakes and hawks, but adults have few natural predators on land.
🛡️ 6. Conservation Status, Population Threats & Protection
Vulnerable. Threats include oil spills, pollution, and El Niño events that deplete local algae beds.
💡 Fascinating Facts & Trivia
- Marine iguanas sneeze salt out of their noses, utilizing specialized glands to filter excess salt from ocean water.
- During food shortages like El Niño, marine iguanas will actually shrink in length and bone size to survive.
❓ Frequently Asked Questions (FAQ)
Direct authoritative answers regarding the biology, feeding habits, and habitat of the Marine Iguana.
The Marine Iguana is scientifically classified as Amblyrhynchus cristatus. It belongs to the genus Amblyrhynchus within the family Iguanidae, class Reptilia, and phylum Chordata.
In the wild, Marine Iguanas inhabit Rocky shorelines, volcanic beaches, shallow intertidal reefs. Their native geographic range primarily spans Galapagos Islands (Ecuador).
The Marine Iguana is classified as a Herbivore. It feeds primarily on specialized nutrients suited to its ecological niche in Rocky shorelines, volcanic beaches, shallow intertidal reefs.
A Marine Iguana can achieve top speeds of 10 km/h (6 mph) swimming and weighs approximately 1 - 12 kg (2.2 - 26 lbs). Its expected natural lifespan is 10 - 15 years.
The Marine Iguana (Amblyrhynchus cristatus) is currently designated as Vulnerable on the IUCN Red List of Threatened Species.
Cite this Article
FaunaWiki Zoological Database (2026). "Marine Iguana (Amblyrhynchus cristatus) Species Profile."
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