Bubbly Submarine

Bubbly Submarine (Korean: 버블버블 노란 잠수함, bobeulbobeul noran jamsuham) is an Epic Treasure that was released alongside in the first half of The Living Deep Sea City update. A submarine appears at fixed intervals firing Submarine Bubble Jellies, which grant points when collected.

Story
''A yellow submarine embarking on an adventure into the mysterious underwater world! Get ready to dive into the enchanting depths of the sea and explore the wonders that await!''

Trivia

 * Bubbly Submarine's internal name is "tr0224".
 * Bubbly Submarine is based on the submarine gimmick found in the Lost City of Sugarteara and Deep Sea City Wandercrab Breakout Episodes.
 * When Bubbly Submarine is used in a game mode that requires a relay Cookie, such as Trophy Race or Guild Run, the Cookie not actively being used will appear in the window of the submarine as it moves across the screen. (If the first Cookie is actively being used, the relay Cookie will appear on the window of the submarine, and vice versa.)
 * If there is no relay Cookie to run with, the submarine's window will be empty.
 * Interestingly, Bubbly Submarine was released not too long after seahorse watergun, which is another Treasure that has some relation to bubbles.
 * This makes it the third Treasure overall that has a theme surrounding bubbles, following bubblewaveshell and Seahorse Watergun.