Think of it as your regular secret base. Except instead of birds, you have sharks
"If you're looking for me,
You'd better check under the sea,
'Cause that is where you'll find me
Underneath the Sealab
Underneath the water
At the bottom of the sea."
Characters have their base of operations underwater. Somewhat more common with villains. Good for keeping out unwanted visitors. After all, it takes more effort to break in if you have to be looking out for giant squids at the same time.
Compare Elaborate Underground Base
, Island Base
, Space Base
. See also Underwater City
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Anime and Manga
- Daimos: The Brahmins' Home Base on Earth was an underwater base served like their headquarters to launch attacks from.
- GaoGaiGar: The Gutsy Galaxy Guard's headquarters is an underwater "Harbor Reef Base" located underneath the Japan Aeronautics headquarters. Later, after the 31 Primevals trash both the Aeronautics headquarters and the base with their attacks, they relocate to an orbital space station base.
- Mazinger Z: The Dragon Baron Ashura was commander of Dr. Hell's sea and submarine fortresses and had two underwater bases: Salude and Bood.
- Science Ninja Team Gatchaman has had a few, and thus by extension, so did Eagle Riders and Battle of the Planets.
- The most noteworthy is Crescent Coral Base (Center Neptune in BotP) which had thrusters on the bottom allowing it to physically move and change locations if discovered and projected a fake coral reef above on the water surface to fool people.
- Gatchaman II had G-Town, a huge mobile base (more like a city) at the very bottom of the ocean.
- The research station from Sphere.
- A Series of Unfortunate Events alludes to the Ancient Conspiracy owning one.
- Also, in the Penultimate Peril, Hotel Denouement is actually a library under the water that reflects the hotel. Everything on the hotel is written backwards so that it's correct in the reflection.
- Beebe Station from the Rifters Trilogy.
Live Action TV
- The Rangers' base in Power Rangers Lightspeed Rescue. Deliberately chosen because water is the demons' Weaksauce Weakness; otherwise, they would have destroyed the base as early as episode 2.
- The Doctor Who story "Warriors of the Deep" was set in an underwater base, from which nuclear weapons were controlled.
- The UFO episode "Reflections in the Water" had an underwater alien base.
- The Looking Glass station on LOST, used by the Others to block all communications coming to the island.
- Lost In Oz had a heroic version with Bellaridere's underwater palace.
- Several new underwater territories have been added to the futuristic Risk 2210 A.D. board game, compared to its original, much better-known, incarnation.
- Transhuman Space features a wide range of established sub-aquatic operations; the most exotic are deep in the ice-covered oceans of Europa, a moon of Jupiter, where a miniature war is being fought for the future of the moon.
- The Pasadena Ocean Lab in Deus Ex was just an advanced research facility for the Big Bad, and devoid of life* , but information there is vital to his plans, and The Dragon makes an appearance.
- The final location of Within A Deep Forest, and the setting of the Knytt Stories level An Underwater Adventure, which is an alternate version of Within a Deep Forest's story.
- There's an abandoned underwater base in MOTHER, which was originally used by Ninten's great-grandfather.
- The Final Boss battle of zOMG Chapter One takes place in Labtech X's Underwater Base.
- Final Fantasy V had the Catapult, an underground/underwater base of Lost Technology. Among other things, it features an airship docking bay, a teleporter and a ship-sized elevator to the sea surface. And the icing on the cake? It's yours now.
- Since X-COM 2 is basically X-COM 1 UNDERWATER!, these make up the bases of your organization.
- The alien bases, including T'leth, also apply.
- Eggman has a few of these.
- The Ocean Palace of Zeal in Chrono Trigger at least before it turns into the Black Omen.
- Knights of the Old Republic has one owned by the good guys on Manaan. "Owned" being in the past tense.
- Constructing underwater structures is a popular activity in Minecraft.
- The deep-sea installation NORAD VI in The Journeyman Project.
- Rockman 4 Minus Infinity had the second half of Dive Man's level. Mega Man finds it by using Rush Marine to dive down to the point where the background is black and heads right.
- Pokémon Ruby and Sapphire the undersea base of the villainous team. Which team it is depends on what you're playing. In Ruby, it's Magma, in Sapphire and Emerald, it's Aqua (while Magma's base is instead hidden inside Mt. Chimney).
- In the Pokémon Peace Squad games, many Team Aqua bases are this. The exceptions are Aqua Submarine (a submarine), Aqua Island (an artificial island), and Aqua Galleon (a high-tech pirate ship).
- The Swedish game Djuphavsjakten ("The deep sea hunt") features this. The exact details are a spoiler: it features this trope twice, as it turns out — once you capture the villain's first underwater base of operations, it turns out he has a larger underwater base deeper into the ocean, leaving the good guys to build up the captured base for their own underwater operations.
- This is the setting for Sega Saturn horror game Deep Fear, and used as the justification for the oxygen-counter mechanics.
- Rapture of BioShock of course is an underwater city. More utilitarian areas of it fits this trope.
- Madblood's lair (a later one) in Narbonic.
- The Floridian superheroes known as the Caribbean Crew has a hidden base is sunken off the coast of Key West. From the outside, it mostly looks like a coral reef.
- Villain Source (Your Online Source For Everything Evil) naturally has one of these for sale. However you have to provide your own aquatic construction personnel. And avoid flooding the place from the obvious and accessible control panels.
- Coyle Command has Posiedon's vault.
- Sea Base Alpha in the EPCOT attraction The Living Seas, before the Nemo makeover.