Generally active at night, the Galapagos bullhead shark forages along the seabed for shellfish, such as crabs, along with other marine invertebrates (6). The powerful rear teeth allow this species to crush shells with ease, digesting the soft innards and regurgitating the hard parts (4). In contrast to the common perception of most shark species as formidable, dynamic predators, the Galapagos bullhead shark is relatively docile, and a poor swimmer (4) (6). Despite its protective dorsal fin spines, this species has been known to be consumed by the much larger, notoriously voracious tiger shark (2).
The Galapagos bullhead shark produces eggs rather than live young. The eggs are roughly cone shaped, with a spiral flange running around the outside (2) (4). Like other bullhead sharks, this probably enables the egg to be wedged into a rock, making it difficult for predators to remove (4). The newly hatched sharks measure around 17 centimetres in length, and do not reach sexual maturity until they measure between 48 and 61 centimetres long (2) (6).