TheMarine Tube (Japanese:マリンチューブMarine Tube) is an underwater location inUnova introduced inPokémon Black 2 and White 2. It is a tube that connectsUndella Town withHumilau City underneathUndella Bay.

Marine Tube マリンチューブ Marine Tube "Wild Missingno. appeared!"
Recommended Level:	{{{reclvl}}}
Map description:	An undersea tunnel built using cutting-edge technology.
Location:	BetweenUndella Town andHumilau City
Region:	Unova
Generations:	V
Location of Marine Tube inUnova.
Pokémon world locations

Known as "the walk-through aquarium", the Marine Tube was built during the two years betweenPokémon Black and White and their sequels. It was constructed to commemorate the friendship between Undella Town and Humilau City and was designed, as stated by an NPC, "to see, not to move." When theplayer first arrives in Undella Town, the Marine Tube is closed for cleaning and yet to open. The cleaning is completed at the same time the player earns theLegend Badge and defeatsTeam Plasma inOpelucid City.

The Marine Tube is a transparent tube made of 9.8 inch glass built to withstand high water pressures and contact with huge Pokémon. The tunnel was made above ground and lowered into the water. Crossing a six-mile-deep ocean trench, the Marine Tube is one of the many pinnacles of technology in theUnova region.

Plating corals and pyramid-like rocks can be seen in the water surrounding the tube. Lights have been placed outside the tube to provide visibility. There is a canyon halfway along the tube's route, the bottom of which cannot be seen. TheWater-type PokémonAlomomola,Basculin,Frillish,Mantine, andWailord can be observed outside, represented with animations exclusive to this purpose. Each of these Pokémon will only appear at certain times of the day; the player can get the Wailord WatcherMedal by spotting an elusiveWailord, which are common between 3:00 PM and 5:00 PM (going by the time the player entered the Marine Tube).

There are no wild Pokémon or Trainers to battle in the Marine Tube. There are no items lying around, although the self-proclaimed first fan ofRoxie will give the player aBlack Sludge if they show her a Pokémon holding aPoison Barb.

If the player has given a man in an orange shirt aFresh Water atSkyarrow Bridge,Driftveil Drawbridge,Tubeline Bridge,Village Bridge, andMarvelous Bridge, then they will meet up with the same man here. Should the player give him another Fresh Water, then he will become rehydrated and dash back to the Skyarrow Bridge withsome gifts for the player.

Gate (Undella Town)	Gate (Humilau City)

Pokémon Adventures

Black 2 & White 2 arc

The Marine Tube first appeared inPink Slip.Cheren and his students were taken there byMarlon andBenga after being rescued fromCastelia City, which had been frozen by thePlasma Frigate.

InThe Final Battle,Cedric Juniper andBianca helped Cheren and Benga to break the ice covering the Marine Tube's Undella Town entrance, and therefore free Cheren's class from the tunnel.

This listing is of cards mentioning or featuring the Marine Tube in thePokémon Trading Card Game.

Related cards Cards listed with ablue background are only legal to use in the currentExpanded format. Cards listed with agreen background are legal to use in both the currentStandard andExpanded formats.
Card	Type	English Expansion	Rarity	#	Japanese Expansion	Rarity	#
Jellicent		Boundaries Crossed		45/149	Freeze Bolt		022/059