Gillwing

Gillwing is giant Nightmaren monster and a villain in NiGHTS: Into Dreams.

Appearance
He is a gigantic green-and-blue tadpole-like creature attached to bat wings.

Arena
Gillwing is the boss of Claris Sinclair Spring Valley dream.

You could attack his head, but it will do very little damage. The quickest way to defeat this Nightmaren is to perform a paraloop right underneath the monster's body to kill him instantly.