Musclebeast

Musclebeasts are monsters indigenous to Alternia. In contrast to shadow droppers, which roam the planet during the day, musclebeasts are HS 2323 (nocturnal), but are described as equally hard to kill. They are frequently featured in the the art of the higher blood castes, appearing in HS 2211 and as the subject of much of Equius Zahhak's slam poetry HS 2826.

As their name suggests, musclebeasts are characterized by their exaggerated musculature. They are also described as HS 3306 with some physiology similar to that of humans (much like humanimals), and as being hermaphroditic, with both milk-secreting organs and sexual anatomy similar to that of male horses. Vriska describes the milk of Equius' lusus as HS 2222, but it is otherwise implied that Aurthour is of a similar but different milk-producing species HS 6378.

According to Equius: Seek the highb100d, ; a description similar to many of the zoologically dubious featured in Rose's grimoire.

Among Grandpa Harley's collection of decor in and surrounding the Half-Harley Manor is a statue of a muscular and upright horse-like being perhaps taken from Alternia.

In Paradox Space
The Paradox Space story ​​​​​​​​​​​​ revolves around Alternian musclebeast art, displayed at a building called the. The pieces displayed at the Nudeseum include musclebeast sculptures made of both stone and frozen sweat, as well as timepieces in the shape of various pieces of musclebeast anatomy. One of the Nudeseum's most valued displays is the frozen body of a large musclebeast resembling a yeti called the Sweati, which Equius considers a.

In Hiveswap: Friendsim
Statues of muscular horse-headed monsters can be seen in the background of the arena where Nihkee Moolah practices Muscle Theatre in Volume Seventeen. These monsters appear to have three eyes on either side of their heads.