|“||Sponges! Watch for shrinkage...||”|
— Agent 1
Sponges are a mechanic in Splatoon and Splatoon 2's single-player modes, Octo Valley and Octo Canyon, serving as platforms and sometimes barriers. They can even be found in some Splatoon 2 multiplayer stages.
Sponges begin as tiny yellow cubes suspended in the air. They rapidly expand when hit by Agent 3's ink, but shrink when hit by Octarian ink, making a unique rubbery sound in either case. They have small lights on the corners, which light up in the player's color ink when expanding and purple when being shrunk by Octarians. They become completely covered with Agent 3's ink no matter how or where they are shot, making it quite easy to swim on them in squid form. In early missions, sponges are located over safe surfaces and have few distractions, but later on, they are usually over bottomless pits and are surrounded by enemies, requiring careful travel.
In Splatoon 2
Sponges make a return in Splatoon 2, serving the same function as in the first game, although they can come in different shapes and sizes than before.
Like Inkrails, they can be found in some multiplayer maps, primarily in the redesigned Port Mackerel and in other maps like Sturgeon Shipyard. In multiplayer, sponges start out as one team's color and cannot change colors during a match. They also take more ink to inflate. Ink Mines and Squid Beakons can not be placed on sponges.
- In Splatoon, one Burst Bomb immediately inflates a sponge to its maximum size. This can be a useful option in a pinch because of its speed.
Sponges are also part of the fifth area in Octo Valley.
In Splatoon 2
- Starfish Mainstage (Turf War and Splat Zones)
- Port Mackerel
- Sturgeon Shipyard (Turf War, Splat Zones, Tower Control, and Rainmaker)
- Shellendorf Institute (Turf War and Tower Control)
- Goby Arena
- Piranha Pit (Turf War, Splat Zones, Tower Control, and Clam Blitz)
- Camp Triggerfish (Turf War, Splat Zones, and Tower Control)
- New Albacore Hotel (Turf War, Splat Zones, Rainmaker, and Clam Blitz)
- Ancho-V Games
- Skipper Pavilion (Turf War, Splat Zones, and Tower Control)
- The Reef (Turf War, Tower Control and Rainmaker)
- Inkblot Art Academy (Clam Blitz)
- Musselforge Fitness (Turf War and Splat Zones)
- Arowana Mall
- Manta Maria (Rainmaker)
- MakoMart (Splat Zones and Tower Control)
- Sweet Valley Tentacles
- The Switches
- Railway Chillin'
- The Splat in our Zones
- Furler in the Ashes
- Welcome to Octopia (Mission #02)
- Octoseeker Shakedown (Mission #10)
- Suction-Cup Lookout (Sector 2)
- Towering Heights (Mission #18)
- Transfer Junction (Mission #24)
- Abandoned Station
- Far-Out Station
- Bounce with Me Station
- Bumpin' 8-Ball Station
- Ink from Above Station
- Shrinky Ink Station
- Sweet Ride Station
In Splatoon 3
- Eeltail Alley (Turf War)
- A rectangular sponge can be stood on top of by enemy players if they super jump to a Squid Beakon or another player in front of it.
- When stood on, the top of the sponge around where the player is standing will dip down slightly
Names in other languages