Otters are carnivorous mammals in the subfamily Lutrinae. The 13 extant otter species are all semiaquatic, aquatic, or marine. Lutrinae is a branch of the Mustelidae family, which includes weasels, badgers, mink, and wolverines, among other animals.
Otter
Sign warning drivers in Benbecula in the Outer Hebrides to beware of otters on the road
"Kawauso" (獺) from the Gazu Hyakki Yagyō by Sekien Toriyama
Image: Fischotter Lutra lutra 1
In biology, being semiaquatic refers to various macroorganisms that live regularly in both aquatic and terrestrial environments. When referring to animals, the term describes those that actively spend part of their daily time in water, or land animals that have spent at least one life stages in aquatic environments. When referring to plants, the term describes land plants whose roots have adapted well to tolerate regular, prolonged submersion in water, as well as emergent and (occasionally) floating-leaved aquatic plants that are only partially immersed in water.
The common frog, one of the most ubiquitous semiaquatic amphibians in Europe
Atlantic mudskippers, amphibious fish of mangrove swamps and tidal flats
Pachygrapsus marmoratus, a semiterrestrial crab
Hunting stance of Dolomedes minor, a semiaquatic spider
