The Amphituber family is a family of frog-like amphibians in the Pikmin games. Their family name is a portmanteau of "amphibian" and "tuber", due to their potato-shaped body.
The wogpole resembles a tadpole, and is in fact the juvenile form of amphitubers. It is one of the weakest water-based enemies in the Pikmin series. In the first game, it only appears in The Forest of Hope and The Distant Spring. They are typically a hard-to-get, low-reward enemy in that they are fast swimmers that run away and only produce one seed when carried to the Onion. In Pikmin 2, they are found in the Awakening Wood and Perplexing Pool areas, as well as being found in the sublevels of some caves, such as the Shower Room. Also, they can occasionally get out of the water. When they do this, they will flop high in the air and their speed is drastically reduced. As stated, they are not worth killing, so don't bother unless you really want to retrieve them.
Yellow Wollywogs are more slender, taller, yellow versions of Wollywogs that live near bodies of water out in the open like in The Distant Spring or Perplexing Pool as opposed to underground areas, though this is not always true. Like Wollywogs, they try to crush Pikmin by jumping into the air. To defeat them, it is best to approach from behind and throw Pikmin on top, calling them back before the creature falls.
Wollywogs are a species of mature amphituber that live in the bowels of subterranean areas. They are gray and have red eyes, and are usually found in watery cave-live areas, such as caves in Pikmin 2 and The Forest Navel in Pikmin. They are defeated in the same manner as Yellow Wollywogs, but are more aggressive, and attack with a jump more readily. The lack of skin coloration is due to living in sunlight-free places.
The Large-Mouth Wollywog is the only boss in the amphituber family, and it apears only in the Pikmin Adventure game in Nintendo Land. It has eyes on stalks, a large mouth (obviously) and can only be attacked at specific parts of its body at specific parts of the fight (i.e., The tongue at the start of the fight, its cheeks at the middle of the fight, and its back at the end of the fight). The Large Mouth Wollywog does not attack by jumping, but rather by extending its spike-ball-tongue at the player. This tongue will do damage whether or not it is the boss's current weak spot.