海 is a Chinese hanzi, listed here under the keyword “sea”. It is built from 氵 (water) and 每 (every). It appears as a component in 2 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “water” + “every”. 海 is among the results, together with every other character containing the same shapes.
Open 海 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.