Answer:

OTTER

Answer	Crossword Clue
OTTER	Furry swimmer
OTTER	Playful mammal
OTTER	Weasel family member

OTTER	Weasel's kin
OTTER	Web-footed mammal
OTTER	"Ring of Bright Water" pet
OTTER	Aquatic mammal
OTTER	Friend of Mole and Water Rat
OTTER	Weasel's relative
OTTER	River dweller
OTTER	Web-footed swimmer

OTTER	Riverbank animal
OTTER	Riverbank romper
OTTER	Weasel-like swimmer
OTTER	Water-loving critter
OTTER	"Animal House" brother
OTTER	Hermione's marine mammal patronus
OTTER	Playful swimmer
OTTER	Monterey Bay sight

OTTER	Riverine resident
OTTER	Tarka, for one
OTTER	Web-footed beast
OTTER	Erie hockey player
OTTER	Whiskered romper
OTTER	Water-loving mammal
OTTER	Fun-loving mammal
OTTER	River frolicker

OTTER	Furry frolicker
OTTER	Fish-eating frolicker
OTTER	"Animal House" role
OTTER	Marine mammal that lacks blubber
OTTER	Amphibious mammal
OTTER	Fish-eating mammal
OTTER	Thick-furred mammal
OTTER	Tim Matheson's "Animal House" role

OTTER	Frisky mammal
OTTER	Mud-sliding mammal
OTTER	Musk secreter
OTTER	Pup bearer
OTTER	Lively aquatic mammal