Deep Bloober Sea

Deep Bloober Sea is an underwater-based board in Mario Party 3 (note that Deep Bloober Sea features the most contemporary use of the term "Bloober", an older word for "Blooper"). The gameboard is inhabited by (as the name implies) Bloopers, Cheep-Cheeps, and other sea life. There are a few junctions here, but the main one is looked over by a Sushi in a submarine. Every time players get here, the shark would make them press one of four buttons before taking the path they chose. Three buttons did nothing, allowing safe passage, but one fired a torpedo at the player, blasting them to the opposite path. The buttons did not reset with each pass; every time someone passed the junction, they would be forced to choose a button that was not previously pressed. The buttons would reset only when a player chooses the wrong button.

Landing on a Happening Space near the giant Baby Blooper makes it call for its mother, whose huge tentacles takes the player to the other side of the board. Action Time happens when someone lands on a Happening Space next to a giant vacuum angler fish. The arrow on the angler fish spins around, then points to the bottom, the front, or the right. Then, the angler fish starts inhaling all players in front of it. Players need to tap the A button to swim against the suction. Anyone who failed would be sucked into the angler fish, then spat out in the direction the arrow was pointing to, landing near a Sushi, a Boo, or back at the start.

In Story Mode, the human player had to go up against three opponents and battled here to get the Kindness Star Stamp.