Simplified from 鰻 (魚 → 鱼).
In current form, Phono-semantic compound (形聲): semantic 魚 (“fish”) + phonetic 曼 (OC *moːn, *mons) – a kind of fish. Note that 曼 has meaning of “long”, hence connotations of “a long fish, an eel”.
鳗 (radical 195 鱼+11, 19 strokes, cangjie input 弓一日田水 (NMAWE), composition ⿰鱼曼)
|For pronunciation and definitions of 鳗 – see 鰻.
(This character, 鳗, is the simplified form of 鰻.)