- Order: Decapoda
- Infraorder: Brachyura
- Superfamily: Shield Crab
- Family: Hermitaur
Daimyo Hermitaur fill a variety of niches. They are filter feeders, ambush hunters, and scavengers. They will sometimes lurk under the sand and wait for a meal to pass by. When this happens, the Daimyo Hermitaur will spring its trap, lunging upward and crushing its prey's back with its strong claws. It will feast quickly, then promptly leave the immediate area. Staying would risk the Daimyo Hermitaur's safety, as the smell of blood may attract predators larger than itself. Daimyo Hermitaur will also meticulously sift through large quantities of sand, looking for small creatures and organic material. Daimyo Hermitaur will even eat humans when given the chance. This is a safe way to get a meal, but is a slow process. It may spend hours picking through sand before it has consumed enough food. Daimyo Hermitaurs will occasionally turn to scavenging if food is scarce. They will often intimidate smaller predators such as Velociprey, using their sheer size and massive claws to show their dominance. These large crustaceans inhabit areas that harbor fearsome predators like Tigrex, Copper Blangonga, Kuarusepusu, Lagiacrus, Plesioth, Abiorugu, Meraginasu, Tigerstripe Zamtrios and rare Elder Dragons such as Kushala Daora and Teostra all of which can kill Daimyo Hermitaur and the juvenile Hermitaurs. Recently in the Desert a large flightless wyvern known as Odibatorasu have been seen actively preying on Akura Vashimu, a Carapaceon related to Daimyo Hermitaur, killing said creature with ease. One can only imagine what these titanic wyverns would be capable of doing to a Daimyo Hermitaur as their crushing jaws can crush the Carapaceon's armored exoskeleton.
Stonefist Hermitaur have many of the same adaptions as Daimyo Hermitaur, however, there is a few differences between them. Stonefist Hermitaur has a darker red and indigo-colored exoskeleton. Its color has changed due to it living for many years and possibly quantities of water. Its right pincer is three times the size it would normally be and is covered in an especially hard exoskeleton, giving it the secondary name, Stonefist. The exoskeleton of Stonefist Hermitaur can destroy whole weapons and repel most attacks from hunters. Unlike Daimyo Hermitaur, Stonefist Hermitaur has one large pincer used for crushing foes, throwing debris, and defense. Compared to Daimyo Hermitaur, this monster's size rivals some Flying Wyverns.
Stonefist Hermitaur is a heavily defensive monster. In order to hunt one, one must take out all of its defenses. From this, the Hunter's Guild only allows hunters with special permits to hunt these Daimyo Hermitaur down.