海鷂魚[ei] ray (fish)
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一天四海[ittenshikai] the world
雲海[unkai] sea of clouds
沿海[enkai] coast

遠海[enkai] deep sea
黄海[koukai] Yellow Sea
温海[atsumi] warm sea
海の幸[uminosachi] seafood

河獺[oso] otter (Lutra lutra)
獺虎[rakko] sea otter (Enhydra lutris)
獺祭[dassai] arraying a number of reference books in order to compose poetry
ユーラシア川獺[yuurashiakawauso] European otter (Lutra lutra)

海獺[umiuso] sea lion
小爪川獺[kotsumekawauso] Asian small-clawed otter (Aonyx cinerea)
獺魚を祭る[kawausouowomatsuru] one of the 72 climates (from the 16th to the 20th of the first lunar month)