It is believed that around 4.5 million years ago, marine iguanas evolved from land iguanas that were brought to the Galapagos and adapted to a sea-faring life … Conservation status. Size. Males when they are approximately 6-8 years old. Breeding season is December-March. LIFE SPAN: 12 years. 5-12 years Marine iguanas can reach an age of up to 60 years, but average is 12 years or less. Average: 1.5 kilograms Maximum: unknown. Family: Iguanidae. Females guard the burrow for several days then leave the eggs to incubate for about 89 to 120 days. 3. Sexual maturity is marked by the first steep and abrupt decline in bone growth cycle thickness. Under normal circumstances they make shallow dives, usually lasting around 10 minutes. Scientific Name: Amblyrhynchus cristatus. Iguana marina. Females reach sexual maturity when 3-5 years old. Average: 0.7 metres Maximum: 1.5 metres. This iguana species have the average lifespan about 5-12 years in the wild. Marine iguanas “sneeze out” excess salt their body collects while underwater through a nasal gland. Marine iguanas mostly eat marine algae. Spanish name. Nesting season lasts from January-April. Weight. Marine Iguana Habitat The male iguanas from this species can dive as deep as 30 m and spend up to one hour underwater. Vulnerable . Common Name: Marine iguana. Category: Iguana. Scientific name. Average lifespan. Females dig burrows in the sand 30-80 cm deep and up to 300m inland where they lay 1-6 eggs. The much-maligned marine iguanas of the Galápagos Islands are so famously homely, even Charles Darwin piled on, describing them as "hideous-looking" and "most disgusting, clumsy lizards." 7. Larger iguanas will dive into the sea in order to forage, sometimes diving as deep as 12 m (39 ft) and staying submerged for more than an hour. Hybridization between the Galapagos land and marine iguanas has been documented on Plaz… Mating territories are defended by males. Amblyrhynchus cristatus. Female marine iguanas reach sexual maturity at the age of 3–5 years, while males reach sexual maturity at the age of 6–8 years. Marine iguana.