Gillygan is a male Atlantean with amphibious adaptations. He has blue skin, green eyes and webbed ears, claws and feet. He wears a Atlantean sorcery outfit with a yellow belt. The yellow belt is used tons a time as a air mask. He has a fin-like mohawk. In mermaid form, he has a blue tail, which is a mash-up of Rad Middleton's tail and Lori Lemaris's tail.
Gillygan is a eager student who wanted to know a lot about the surface world.
- Breathe Underwater
- Gills on his neck
- Can feed drowning victim oxygen
- Enhanced Strength
- Underwater Respiration
- Able to turn his legs into a fish tail and back at will
- Fast Swimmer
- Underwater Pressure Resistance
- Can see in the dark
- Can talk to fishes