Fishman (魚人 Gyojin) (Fishmen in plural) are race of ghost-like aliens that appeared in Ultraman Gaia.
Subtitle: Illusion Monster (幻影怪物 Gen'ei Kaibutsu)
When Zog unleashed a group of Dobishi to Earth for invasion, these Fishmen appeared where they roaming at the city mindlessly moments before her arrival. Despite having appeared and frightening the citizen, they didn't harm them. After she appeared, Zog destroyed a group of them with one of her beams.
- Although they actually appeared, due to their nature of being ghosts-like appearance, they were intangible to almost everything as they also never intended to harm the citizens.
- Their suits are modified from Digon in Ultraman Dyna, with additions of torn clothes.
- Height: 2.3 m
- Weight: Unknown
- Origin: M91
- Powers and Weapons
- Intangibility: Due to their nature of being ghosts-like appearance, they were intangible to almost everything.