Hypselognathus horridus, known commonly as the prickly pipefish or shaggy pipefish is a species of marine fish belonging to the family Sygnathidae This species lives on the continental shelf in depths ranging from . It is endemic to the Great Australian Bight, located in South Australia.[1] Reproduction occurs through ovoviviparity in which the males brood eggs and give birth to live young [2] [1]