Cheep Cheep Bay

Cheep Cheep Bay is an anomalous or possibly-removed course from Super Mario 64, appearing as a beach level beside mountain said to resemble Tall, Tall Mountain. Players who have encountered this course have noted it's resemblance to World 3 from New Super Mario Bros. for the Nintendo DS. It often replaces Wing Mario Over the Rainbow. This level is notable for containing Cheep Cheeps in this level.

Geography
In most variations of the course, Cheep Cheep Bay consists of a sandy beach landscape surrounded by water (which you can swim in) leading onto a mountain, which is said to resemble Tall, Tall Mountain. In other reports, the mountain appears somewhat original and presumably hasn't been borrowed from another course. Enemies associated with the course are varied in different reports.

Cheep Cheeps
Cheep Cheeps are found in this level, and behave mostly like they did in past Mario titles, most notably Super Mario World in which they swim around, however they also gained the ability to jump out of the water and dive into Mario, likely as a way to make them more challenging in a 3d space.

Missions
There are five missions associated with all variations of this course:


 * "To the Tip of the Boulder!" Collecting the star at the top of the mountain
 * "8 Red Coins on the Island" Collecting eight red coins around the course
 * "Go Treasure Hunting in The Deep Blue" A star that has the same principles of the JRB and DDD stars, with opening chests in the right order.
 * "Wing Mario to the Island in the Sky" Finding a Wing Cap near the top of the mountain and flying to an island in the sky to collect a star.
 * "Secret of the Mountain" Finding five secrets around the course

Theorizing
This level, considering the fact that this is the only level that has Cheep Cheeps instead of Bubs, it is possible that originally, Bubs were supposed to be Cheep Cheeps, but were replaced due to most water levels being large and less chances of putting Cheep Cheeps in challenging spots likely supported their replacement.