Port Jackson Shark (Heterodontus portusjacksoni), egg cases resting on a sandy bottom near sea alga. Found throughout temperate Australian waters. Photo taken at Edithburgh, York Peninsula, South Australia, Australia. © Gary Bell / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni). Also known as Bullhead, Oyster Crusher and Tabbijaw. New South Wales, Australia © Gary Bell / OceanwideImages.com
Crested Horn Shark (Heterodontus galeatus) - juvenile. Also known as Crested Port Jackson Shark and Bullhead Shark. New South Wales, Australia © Gary Bell / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni). Also known as Bullhead, Oyster Crusher and Tabbijaw. Found on coastal reef throughout the southern part of Australia. © Gary Bell / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni). Also known as Bullhead, Oyster Crusher and Tabbijaw. Found on coastal reef throughout the southern part of Australia. © Gary Bell / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni). Also known as Bullhead, Oyster Crusher and Tabbijaw. Found on coastal reef throughout southern Australia. Photo taken Port Phillip Bay, Mornington Peninsula, Vic, Australia © Gary Bell / OceanwideImages.com
Varied Carpet Shark (Parascyllium variolatum). Also known as Southern Catshark, Necklace Carpet Shark and Varied Catshark. Southern Australia © Rudie Kuiter / OceanwideImages.com
Collared Carpet Shark (Parascyllium collare). Also known as Collared Catshark. New South Wales, Australia © Rudie Kuiter / OceanwideImages.com
Rusty Carpet Shark (Parascyllium ferrugineum). Also known as Rusty Catshark. Southern Australia © Rudie Kuiter / OceanwideImages.com
Horn Shark (Heterodontus japonicus). Izu Peninsula, Japan © Rudie Kuiter / OceanwideImages.com
Horn Shark (Heterodontus japonicus). Izu Peninsula, Japan © Rudie Kuiter / OceanwideImages.com
Crested Horn Shark (Heterodontus galeatus) - juvenile. Also known as Crested Port Jackson Shark and Bullhead Shark. New South Wales, Australia © Rudie Kuiter / OceanwideImages.com
Crested Horn Shark (Heterodontus galeatus) - juvenile. Also known as Crested Port Jackson Shark and Bullhead Shark. New South Wales, Australia © Rudie Kuiter / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni) - juvenile. Also known as Bullhead, Oyster Crusher and Tabbijaw. Albany, Western Australia © Andy Murch / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni) - juvenile. Also known as Bullhead, Oyster Crusher and Tabbijaw. Albany, Western Australia © Andy Murch / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni) - juvenile. Also known as Bullhead, Oyster Crusher and Tabbijaw. Albany, Western Australia © Andy Murch / OceanwideImages.com
Horn Shark (Heterodontus francisci). Also known as California Horn Shark. Heterodontus means 'different teeth' and refers to this shark's pointed teeth at the front, and flattened crushing teeth in the rear of the mouth. Catalina Island, California, USA © Andy Murch / OceanwideImages.com
Horn Shark (Heterodontus francisci). Found on the continental shelf of the eastern Pacific Ocean, occurring off the coasts of California and Baja California from Monterey Bay southward, and in the Gulf of California. Phototaken La Jolla Cove, California, © Andy Murch / OceanwideImages.com
Jaws of a Port Jackson Shark (Heterodontus portusjacksoni) - demonstrating why this family is called heterodontidae which literally means 'different teeth'. Found throughout southern Australia. © Andy Murch / OceanwideImages.com
Jaws of a Port Jackson Shark (Heterodontus portusjacksoni) - demonstrating why this family is called heterodontidae which literally means 'different teeth'. Found throughout southern Australia. © Andy Murch / OceanwideImages.com
Mexican Horn Shark Egg Case (Heterodontus mexicanus). Photo taken at Isla Coronado, Loreto, Baja, Sea of Cortez, Eastern Pacific. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Tateyama, Chiba, Honshu, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Tateyama, Chiba, Honshu, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Tateyama, Chiba, Honshu, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Tateyama, Chiba, Honshu, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus) - with diver. Aka Japanese Horn Shark. Heterodontidae. Tateyama, Chiba Honshu, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Tateyama, Chiba Honshu, Sea of Japan. © Andy Murch / OceanwideImages.com
Shark egg case or mermaids purse belonging to a Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Tateyama, Chiba Honshu, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Tateyama, Chiba Honshu, Sea of Japan. © Andy Murch / OceanwideImages.com
Shark egg case or mermaids purse belonging to a Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Tateyama, Chiba Honshu, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Hatsushima Island, Izu Peninsula, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Hatsushima Island, Izu Peninsula, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Hatsushima Island, Izu Peninsula, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus) - with diver. Aka Japanese Horn Shark. Heterodontidae. Hatsushima Island, Izu Peninsula, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus) - with diver. Aka Japanese Horn Shark. Heterodontidae. Hatsushima Island, Izu Peninsula, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus) - with diver. Aka Japanese Horn Shark. Heterodontidae. Hatsushima Island, Izu Peninsula, Sea of Japan. © Andy Murch / OceanwideImages.com
Japanese Bullhead Shark (Heterodontus japonicus). Aka Japanese Horn Shark. Heterodontidae. Hatsushima Island, Izu Peninsula, Sea of Japan. © Andy Murch / OceanwideImages.com
Galapagos Bullhead Shark (Heterodontus quoyi) aka Galapagos Horn Shark. Eastern Pacific. Confined to the Galapagos Islands and coastal Peru. © Andy Murch / OceanwideImages.com
Galapagos Bullhead Shark (Heterodontus quoyi) aka Galapagos Horn Shark. Eastern Pacific. Confined to the Galapagos Islands and coastal Peru. © Andy Murch / OceanwideImages.com
Galapagos Bullhead Shark (Heterodontus quoyi) aka Galapagos Horn Shark. Eastern Pacific. Confined to the Galapagos Islands and coastal Peru. © Andy Murch / OceanwideImages.com
Galapagos Bullhead Shark (Heterodontus quoyi) aka Galapagos Horn Shark. Eastern Pacific. Confined to the Galapagos Islands and coastal Peru. © Andy Murch / OceanwideImages.com
Galapagos Bullhead Shark (Heterodontus quoyi) aka Galapagos Horn Shark. Eastern Pacific. Confined to the Galapagos Islands and coastal Peru. © Andy Murch / OceanwideImages.com
Galapagos Bullhead Shark (Heterodontus quoyi) aka Galapagos Horn Shark. Eastern Pacific. Confined to the Galapagos Islands and coastal Peru. © Andy Murch / OceanwideImages.com
Galapagos Bullhead Shark (Heterodontus quoyi) aka Galapagos Horn Shark. Eastern Pacific. Confined to the Galapagos Islands and coastal Peru. © Andy Murch / OceanwideImages.com
Galapagos Bullhead Shark (Heterodontus quoyi). Photo was taken at the Galapagos Islands. © David Fleetham / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni). Also known as Bullhead, Oyster Crusher and Tabbijaw. Found on coastal reef throughout the southern part of Australia. Photo taken Jervis Bay, NSW. © David Fleetham / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni). Also known as Bullhead, Oyster Crusher and Tabbijaw. Found on coastal reef throughout the southern part of Australia. Photo taken Jervis Bay, NSW. © David Fleetham / OceanwideImages.com
Port Jackson Shark (Heterodontus portusjacksoni). Also known as Bullhead, Oyster Crusher and Tabbijaw. Found on coastal reef throughout the southern part of Australia. Photo taken Jervis Bay, NSW. © David Fleetham / OceanwideImages.com
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