鰯 is a Japanese kanji written with 21 strokes, listed here under the keyword “sardine”. It is built from 魚 (fish) and 弱 (weak). In Remembering the Kanji by James W. Heisig it is frame 2828.
On KumiJi Glyph Explorer, open the parts search and type “fish” + “weak”. 鰯 is among the results, together with every other character containing the same shapes.
Open 鰯 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.