Final Answer:
The marine iguana spends part of its time in the sea by foraging for algae underwater, and its unique adaptations, such as specialized glands and efficient swimming capabilities, enable it to thrive in both marine and terrestrial environments.
Step-by-step explanation:
The marine iguana, native to the Galápagos Islands, has evolved remarkable adaptations that allow it to effectively navigate both marine and terrestrial habitats. While primarily a herbivore, the marine iguana spends a significant portion of its time in the sea, where it dives to feed on marine algae. To facilitate this, the iguana possesses specialized salt glands that excrete excess salt accumulated from ingesting seawater.
In addition to its unique glandular adaptations, the marine iguana has streamlined bodies and powerful limbs, allowing efficient swimming and diving capabilities. These adaptations are crucial for its survival, enabling the iguana to access underwater food sources and efficiently regulate its salt balance.
Your question is incomplete, but most probably your full question was "How does the marine iguana spend part of its time in the sea, and what adaptations enable it to thrive in both marine and terrestrial environments?"