Here's why:
* They get their food in the water: Sea otters primarily eat shellfish, crustaceans, and other marine life found underwater.
* Their fur provides insulation: They have the densest fur of any mammal, which keeps them warm even in cold waters. This fur acts as insulation and prevents heat loss.
* They don't bask in the sun: Unlike some marine mammals like seals or sea lions, sea otters don't typically spend time basking in the sun to regulate their body temperature.
However, sunlight does play a role in their lives:
* Sunlight helps them see: Like any animal, they need some light to see their surroundings, especially when foraging for food.
* Sunlight warms the water: While not crucial for survival, warmer waters can be more comfortable for them.
In conclusion, sea otters don't have a specific sunlight requirement for survival, but it does play a role in their daily lives, particularly in visibility and comfort.