Sea Shell Shenanigans (ゆらゆらかいてい たんけん lit. Wavering Undersea Expedition in Japanese) is the seventh level and is the second level of the second warp room in Crash Bandicoot: The Wrath of Cortex. The whole level takes place in the underwater ocean floor. This level is based on marine life which houses corals, fishes and other uncommon creatures that live there.
This level is largely based on the swimming levels from Crash Bandicoot: Warped, with one exception; Crash's new submarine is used to navigate a portion of the level. Also, it is possible to get Aku Aku invincibility from obtaining three masks, which is impossible in Crash 3's swimming levels. Crash can also use the Death Tornado Spin underwater once he obtains it, which was also impossible in Crash 3's swimming levels.