Otter Otter Otters are carnivorous mammals in the subfamily Lutrinae. The 13 extant otter species are all semiaquatic, aquatic or marine, with diets based on fish and invertebrates. Lutrinae is a branch of the weasel family Mustelidae, which also includes badgers, honey badgers, martens, minks, polecats, and wolverines. 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. Male otters are called dogs or boars,
HMQS Otter Commonwealth but served only until 1906 when she was paid off. During World War I, "Otter" was requisitioned from its civilian owner by the Royal Australian Navy and served as an examination vessel. Following the conclusion of hostilities, she was returned to her previous owner. In World War II, "Otter" again served as an examination vessel but only until December 1940. "Otter" was returned to private operations on Moreton Bay, and was scrapped in 1946. HMQS Otter HMQS "Otter" was a patrol vessel that served with the Queensland Maritime Defence Force and Commonwealth Naval Forces. She was subsequently requisitioned by