The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Pages using Tabber parser tag (3 members)
- Pages with broken file links (47 members)
- Posthumous Appearance (Season 1) (1 member)
- Posthumous Appearance (Season 2) (1 member)
- Posthumous Appearance (Season 3) (1 member)
- Recurring Characters (Season 1) (2 members)
- Screen captures (42 members)
- Screen captures (Bad Water) (3 members)
- Screen captures (Games) (2 members)
- Screen captures (Knight of Shadows) (1 member)
- Screen captures (Such Great Patience) (1 member)
- Screen captures (The Devil's Window) (1 member)
- Screen captures (The Good Death) (1 member)
- Screen captures (The Last Lap of Luxury) (1 member)
- Screen captures (To Be or Not to Be) (31 members)
- Screen captures (Treasure of the Mind) (1 member)
- Screen captures (seaQuest DSV) (42 members)
- SeaQuest DSV (42 members)
- SeaQuest DSV Crew (4 members)
- SeaQuest DSV Scientists (2 members)
- SeaQuest Equipment (6 members)
- SeaWiki Templates (1 member)
- Smoke on the Water (1 member)
- Splashdown (3 members)
- Sports (2 members)
- Such Great Patience (4 members)
- Tactical System (1 member)
- Technology (9 members)
- Template using Master screencap (1 member)
- Templates using ParserFunctions (3 members)
- The Devil's Window (4 members)
- The Fear That Follows (2 members)
- The Fear that Follows (1 member)
- The Good Death (3 members)
- The Last Lap of Luxury (5 members)
- The Regulator (2 members)
- The Sincerest Form of Flattery (5 members)
- The Stinger (1 member)
- To Be or Not to Be (66 members)
- Treasure of the Mind (4 members)
- Treasures of the Tonga Trench (1 member)
- UEO Personnel (1 member)
- Vapors (1 member)
- Vehicle (3 members)
- Weapons (2 members)
- When We Dead Awaken (1 member)