根魚

Etymology 1
Compound of.

Noun

 * 1) a non-migratory fish that lives among the roots of seaweed or coral
 * : a greenling kind of fish

Etymology 2
Compound of.

Noun

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

Usage notes
The neuo reading appears to be more common.