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

海驢[ashika] eared seal (esp. the California sea lion, Zalophus californianus)
驢馬[roba] donkey

驢馬の橋[robanohashi] pons asinorum (hurdle to learning)
驢車[rosha] donkey cart