Horn Shark Egg Case - Heterodontus francisci - A smaller species of shark, (about 3.3' / 1 m in length), this bullhead shark can be found along part of the western coast of North America. Its range if from California to the Gulf of California. The spiral-flanged egg case of a horn shark allows the case to be safely secured within crevices
Horn Shark. The horn shark is a small, common, bottom-dweller in the warm waters off western North America. It belongs to the bullhead shark family (Heterodontidae). Its name comes from its short, blunt head with high ridges above the eyes. It has large spines on its two high dorsal fins, and many small dark spots on brownish gray skin. Most adults measure about 1 m, and the maximum length of this species is 1.2 m (3.3 ft).
The egg case of the Horn shark found at Corona del Mar, California. Horn shark egg cases are big corkscrews, and unlike other sharks, the mother horn shark does a little parental care. She carries each egg case in her mouth while it’s still soft, looking for rocks to protect it until the pup hatches 8 or 9 months later. When she finds a good spot, she sort of screws the egg case into the rocky crevice, and when it hardens, most predators can’t get to it. Photo credit: D.J. Eernisse