Sheargrub
Himeagea mandibulosa
Sheargrubs are small, grub-like enemies in both Pikmin and Pikmin 2. They live underground, though surface when they feel vibrations from approaching prey.
Overview
Sheargrubs come in two different colors: pink and purple. Pink Sheargrubs are female, while purple Sheargrubs are male. Female Sheargrubs do not have any mandibles and do not attack Olimar nor Pikmin. Male Sheargrubs, however, are exacltly the oposite. They have mandibles and will jump onto their prey and tear them apart.
In Pikmin, when the male Sheargrubs have a Pikmin in their mouth, they are invincible from damage unless Captain Olimar throws a Pikmin on them. This has been fixed in Pikmin 2, allowing players to kill them even if they have a Pikmin in their mandibles. Sheargrubs, both male and female, will also deconstruct any bridges built. This can be avoided by simply attacking them.
It is also important to note that after you kill opposing Sheargrubs, in 2 or 3 days they will come back.
These creatures are also related to the Shearwig.
Olimar's Notes
Female
The males of this species are purple and black creatures with tapered mouths, while the females are lighter in color and lack an armored exoskeleton. As with most Mandiblards, these creatures have regressed to the point where they have lost both legs and wings. They can be seen crawling around on the ground and are believed to feed on the vegetable extracts from the congealed fluids of expired pikmin.
Male
This specimen is a Male Sheargrub. Having lost both its legs and wings, the male burrows into the soil and waits to ambush small creatures that pass by. This beast's mandibles can be dangerous, making creatures such as pikmin easy prey.
Louie's Notes
Female
For an unforgettable quiche, slice this creature up and mix with four eggs, two vine-ripened tomatoes, dried zucchini, and generous handfuls of feta and swiss. Bake until crusty and golden. This beast is most flavorable if caught and cooked just after laying its eggs.
Male
Spread several specimens in the bottom of a casserole dish and layer with sliced avocado. Bake until the meat is choice and the cheese is lusciously browned.
Killing strategies
Pikmin
When fighting Sheargrubs with Pikmin, simply have them swarm the creatures, causing them a very quick death. Sheargrubs can only eat one Pikmin at a time, causing very minimal, if any, casualties. This can be done against both male and female Sheargrubs.
Captains
When fighting Sheargrubs with a captain, you can just run around them repeatedly pressing "A". You can also dismiss all your Pikmin and simply run alone to the Sheargrubs and defeat them with ease. This method is much safer than fighting them with Pikmin.