Aside from some lithodid crabs which have not too long ago been found in the Antarctic Bellingshausen Sea (Klages et al., 1995; Arana and Retamal, 2000), reptants are usually not recognized from high polar places, wherever water temperature at the seafloor drops forever below about 0°C. This dictionary definitions page https://www.jowissa.com/products/facet-briolette-pendant-necklace-js-0194