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Description
Hybodus houtienensis
Named by Yang Zhongjian, 1940 (Generic name by Louis Agassiz, 1837)
Diet: Carnivore (Prey included fish, invertebrates such as belemnites, and other small prey, as well as scavenging on carcasses)
Type: Chondrichthyes Elasmobranchii Hybodontid shark
Size: 6.6 feet (2 meters) long and 200 lb.
Region: Worldwide
Age: Mid to Late Jurassic (165 to 150 million BC; Callovian to Early Tithonian) for this species, whereas the rest of the other members of the genus lived from the Mid Permian to the Late Cretaceous (260 to 74.8 million BC; Late Capitanian to Late Campanian)
Enemies: Large marine reptiles such as Liopleurodon
Episode: Cruel Sea
Info: Appearing around 260 million years ago during the Permian period, survived the devastating Permian-Triassic Mass Extinction event that killed off 95% of marine life, and thrived in the waters throughout the Mesozoic era, Hybodus was a successful, long-lived, predatory shark that's characterized for the long fin spines on two dorsal fins that was probably used to help cut through the water more efficiently while swimming. It is a member of an extinct line of sharks known as the hybodontiformes which were closests to the neoselachians (modern sharks and rays), distinguished in their cone-shaped teeth shape, and had first evolved in the Carboniferous period, but thrived and diversified throughout the Mesozoic era (Mainly in the Jurassic and Cretaceous period) in not only in ocean, but also in freshwater habitats, until they disappered at the end of the Cretaceous period.

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Walking with Dinosaurs is owned by BBC

Description
Hybodus houtienensis
Named by Yang Zhongjian, 1940 (Generic name by Louis Agassiz, 1837)
Diet: Carnivore (Prey included fish, invertebrates such as belemnites, and other small prey, as well as scavenging on carcasses)
Type: Chondrichthyes Elasmobranchii Hybodontid shark
Size: 6.6 feet (2 meters) long and 200 lb.
Region: Worldwide
Age: Mid to Late Jurassic (165 to 150 million BC; Callovian to Early Tithonian) for this species, whereas the rest of the other members of the genus lived from the Mid Permian to the Late Cretaceous (260 to 74.8 million BC; Late Capitanian to Late Campanian)
Enemies: Large marine reptiles such as Liopleurodon
Episode: Cruel Sea
Info: Appearing around 260 million years ago during the Permian period, survived the devastating Permian-Triassic Mass Extinction event that killed off 95% of marine life, and thrived in the waters throughout the Mesozoic era, Hybodus was a successful, long-lived, predatory shark that's characterized for the long fin spines on two dorsal fins that was probably used to help cut through the water more efficiently while swimming. It is a member of an extinct line of sharks known as the hybodontiformes which were closests to the neoselachians (modern sharks and rays), distinguished in their cone-shaped teeth shape, and had first evolved in the Carboniferous period, but thrived and diversified throughout the Mesozoic era (Mainly in the Jurassic and Cretaceous period) in not only in ocean, but also in freshwater habitats, until they disappered at the end of the Cretaceous period.

Requested by

Walking with Dinosaurs is owned by BBC