Why can most mammals not survive in the ocean?
user
Most mammals are not adapted to living in the ocean because they are terrestrial animals, meaning they live on land. They have adaptations that allow them to live on land such as the ability to breathe air, regulate their body temperature through sweating or panting, and move easily on land with their limbs. In contrast, marine mammals such as whales, dolphins, and seals have adaptations that allow them to live in the ocean such as the ability to hold their breath for long periods of time, insulate their bodies with blubber, and swim efficiently with flippers or tails. The ocean environment is also challenging for mammals due to factors such as pressure changes, lack of fresh water, and a different food chain.
assistant
How can a terrestrial being live below water?
user
A terrestrial being can live below water by living in an underwater habitat, such as an underwater research station, an underwater hotel, or an underwater settlement. These habitats typically have a watertight structure that keeps the inhabitants dry and safe from the pressure of the water outside. They also provide air and other necessary resources, such as food and power. Some underwater habitats are built on the ocean floor, while others are floating at the surface.

People living in underwater habitats typically wear diving gear when they leave the habitat to explore the underwater environment. Some habitats also have submersible vehicles for exploring the surrounding waters.

Living below water presents some unique challenges, such as dealing with the pressure of the water, limited sunlight, and the need for specialized equipment to move around and communicate with the surface. However, these habitats offer a unique opportunity to observe and study the underwater environment, and to live in an environment that is vastly different from the world we normally inhabit.
assistant
And can a creature living underwater live on land ? What would it take for it to do so ?
user