Mark "The Animal" Mendoza, born on July 13, 1952, is an influential American bassist and songwriter, best known for his work with the hard rock band Twisted Sister. He joined Twisted Sister in 1976 and played a pivotal role in their rise to fame during the 1980s, contributing to the band's signature sound characterized by powerful anthems and theatrical performances. Mendoza's notable works include the albums "Stay Hungry" (1984), which features hits like "We're Not Gonna Take It" and "I Wanna Rock," and "Come Out and Play" (1985). His energetic stage presence and distinctive bass style helped define the band's identity and contributed to their success, making them icons of the glam metal scene. Beyond Twisted Sister, Mendoza has also collaborated with various artists and bands, including the heavy metal supergroup The Dictators and his solo projects. He has influenced countless musicians and remains a prominent figure in rock music, celebrated for his contributions to the genre and his role in shaping the image of heavy metal in the 1980s. Mendoza's impact continues to resonate with fans and musicians alike.