The Galapagos bullhead shark, a small, bottom-dwelling elasmobranch, has been around since the early Jurassic period. Discovered 175 years ago, it has been largely overlooked by science and was recently labeled "Data Deficient" by the IUCN. This species can grow up to 107 cm long and lives in flat, rocky, and boulder-strewn reefs, resting motionless on the bottom. Its range includes the Galapagos Archipelago and the Peruvian coast, though it's unclear if the Peruvian population is the same species or a different one (Heterodontus peruanus). If distinct, the Galapagos bullhead would be the only endemic shark species in Galapagos. Unlike larger sharks, Galapagos bullheads are poor swimmers, using their large pectoral fins to crawl along the sea bed. They are nocturnal, foraging at night for shellfish, crabs, and small marine invertebrates, and regurgitating hard shells. They are also the only egg-laying sharks in Galapagos, hiding their corkscrew-shaped eggs in crevices away from predators.