根魚

Compound of 根 (ne, “root”) +‎ 魚 (uo, “fish”).[1][2]

• Kun’yomi
  • (Tokyo) ね​うお [néꜜùò] (Atamadaka – [1])[2]
  • IPA^(key): [ne̞ɯ̟ᵝo̞]

根魚 (hiragana ねうお, rōmaji neuo, historical hiragana ねうを)

1. a non-migratory fish that lives among the roots of seaweed or coral
2. alternative for 鮎並 (ainame): a greenling (kind of fish)

• 根 (ね)付 (つ)き魚 (うお) (netsukiuo)

Compound of 根 (ne, “root”) +‎ 魚 (sakana, “fish”).[1][2] The sakana changes to zakana as an instance of rendaku (連濁).

• Kun’yomi
  • (Tokyo) ねざ​かな [nèzáꜜkànà] (Nakadaka – [2])[2]
  • IPA^(key): [ne̞za̠ka̠na̠]

根魚 (hiragana ねざかな, rōmaji nezakana)

1. a non-migratory fish that lives among the roots of seaweed or coral

The neuo reading appears to be more common.