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

匈牙利[hangarii] Hungary
勃牙利[burugaria] Bulgaria
葡萄牙[porutogaru] Portugal
牙城[gajou] stronghold (esp. of an enemy or opponent)
歯牙[shiga] teeth (and tusks)

歯牙矯正術[shigakyouseijutsu] orthodontia
歯牙疾患[shigashikkan] dental disease
歯牙状[shigajou] dentation
象牙[zouge] ivory

蜷局[toguro] coil
蜷局を巻く[togurowomaku] to coil itself (e.g. a snake)

牙海蜷[kibauminina] mud creeper (Terebralia palustris)
海蜷[uminina] many-formed cerith (Batillaria multiformis)