Diogo Reis, also known as Baby Shark, is a jiu-jitsu black belt under Melqui Galvão, who represents Melqui's squad and Fight Sports in the sport's international circuit. Reis earned his reputation as one of the main grapplers of his generation while competing in the juvenile and colored belt divisions of the sport, where he earned all of the top 4 international tournaments - often designated as the Grand Slam of Jiu-Jitsu - the European Open, Brazilian Nationals, Pan and World Championships. He has since cemented that claim at the professional level with many wins at the upper echelon of grappling's competitive leagues.