noun
slime flounder
A righteye flounder species (Microstomus achne) found in Japanese waters; the name is usually written in katakana.
市場で珍しいババガレイを見つけた。
I found a rare slime flounder at the market.
The name likely derives from 婆 (baba, 'old woman') and 鰈 (karei, 'flounder'), possibly referring to its appearance, but the exact origin is uncertain.