So many names!
A group of otters has a range of names, including a bevy, family, lodge or, as their energy level and antics might suggest, a romp. When in the water, a group of otters is called a raft.
Even otter dens have a special name (or two). Their resting spots are called a hover or a couch, which are usually little more than a bed of reeds. But otters also use what's called a holt. Holts are small underground dens where otters can escape danger, take shelter, and where females raise their young.