[Answer] Indicating how they congregate, a group of resting sea otters is called a what?

We have looked all around the web to find the most relevant answer to your query: 

Indicating how they congregate, a group of resting sea otters is called a what?

• Raft:A group of resting sea otters is called a raft. Researchers have seen concentrations of over one thousand otters floating together while holding hands. To keep from drifting away from each other while they sleep, sea otters will wrap themselves up in seaweed, forming something that resembles a raft. The fur of the sea otter is the thickest in the world, with up to one million hairs per square inch. This fur insulates the body by trapping a layer of warm air between the outer surface and skin. The otter's dense fur also helps the otter stay buoyant in the water.

If you want to answer this question or elaborate it, just do it with below below format in comment box:

@Answer@YourDisplayName@ 

We will ensure your response will help others.