Jellyfloats are jiggly, flying enemies resembling jellyfish, and are only found in certain underground caves in Pikmin 2. They are known for sucking Pikmin into their gelatinous bells and digesting them over considerably long periods of time. Fortunately, they are extremely rare and easy to defeat with a decently-sized army of Pikmin.
Lesser Spotted Jellyfloat
The Lesser Spotted Jellyfloat is an enemy in Pikmin 2. They resemble large, blue, floating jellyfish with yellow spots that float through the air. They attack the Pikmin by inhaling them and trapping them inside. The Pikmin will then be digested one by one over considerably long periods of time. It is vulnerable on all parts of its body, and has moderately low health. Purple Pikmin will automatically make this creature fall due to their weight, they are also good for defeating it, as stunning it will prevent it from getting back into air. When defeated, all undigested Pikmin will be recovered. This enemy is related to the Greater Spotted Jellyfloat, although according to Olimar, the species is struggling as the Greater Spotted Jellyfloats are a foreign species that have wandered into their territory, and being stronger, they are causing the numbers of Lessers to decline. They seem to have antenna similar to the Puffstool in Pikmin 1.They also have an easteregg when you turn off music and turn the sound up you can hear them singing a tune.
Greater Spotted Jellyfloat
The Greater Spotted Jellyfloat is an enemy in Pikmin 2. As their name implies, they resemble larger, purple versions of the Lesser Spotted Jellyfloat. They have slightly more health and can be defeated in the same manner, but can suck up more Pikmin at once, and even your captains if you're not careful. Likewise, all undigested Pikmin and leaders are returned when it is defeated (the Pikmin take a pretty long time to digest so don't panic if a lot get sucked up). This species is also rarer than the other Jellyfloat.