Hemitriakis indroyonoi, known commonly as the Indonesian houndshark in Indonesia, is a species of houndshark in the genus Hemitriakis. It is a tropical houndshark, known from the eastern Indonesian islands of Bali and Lombok, in the Indian Ocean. It was described by William T. White, Leonard J.V. Compagno, and Dharmadi in 2009. Females give birth to live young, with no placenta or yolk sac, and can have between 6 and 11 pups in one litter. When born, the pups measure between 28-30 centimetres long. At first maturity, the houndsharks measure 90 centimetres, and males can go on to reach a maximum length of 120 centimetres, while females can reach a maximum length of 115.2 centimetres.