Most marine mammals stay warm with blubber. Which one depends on an unusually dense fur coat instead?
Otter
The answer was Otter. Here's the why, the decoys, and the source trail.
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A sea otter relies on its fur to help insulate it in cold water. The dense coat traps air close to the body, creating a barrier between its skin and the surrounding water. Keeping that coat in good condition is essential to keeping warm. Otters also eat heavily to fuel their high metabolism, so staying comfortable in the ocean takes both a well-maintained coat and plenty of food.
A sea otter relies on its fur to help insulate it in cold water. The dense coat traps air close to the body, creating a barrier between its skin and the surrounding water. Keeping that coat in good condition is essential to keeping warm. Otters also eat.
Otter is the one to remember. A sea otter relies on its fur to help insulate it in cold water. Some sea otters use a rock to get dinner open.
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Sources: www.nps.gov, www.nps.gov