Nomenclature
The word otter derives from the Old English word otor or oter. This, and cognate words in other Indo-European languages, ultimately stem from the Proto-Indo-European language root *wódr̥, which also gave rise to the English word "water".
An otter's den is called a holt or couch. A male otter is a dog, a female is a bitch, and a baby is a whelp, kit, or pup. The collective nouns for otters are bevy, family, lodge or romp, (being descriptive of their often playful nature) or, when in water, raft.
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