The Sea of a Mysterious Light (妖光の海 Yōkō no Umi) is the 21st episode of Ultraman Gaia.
- Candea (First and only appearance)
- Ultraman Gaia Volume 6 features episodes 21-24.
- The episode gets it's name from the light in the ocean that Candea makes.
- This is the frist appearance of Team Marlin.
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