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The horn shark is preyed upon by larger fishes and the northern elephant seal (Mirounga angustirostris), which consumes adults, juveniles, and egg cases. In addition, they are captured and eaten by bald eagles ( Haliaeetus leucocephalus ) at Catalina Island, and large marine snails are able to drill into their egg cases to extract the yolk . [ 6 ]
Copper shark: Basking shark: Cetorhinus maximus: Cetorhinidae: Endangered [16] Basking shark: Frilled shark: Chlamydoselachus anguineus: Chlamydoselachidae: Least concern [17] Frilled shark in Aquarium Tropical at Palais de la Porte Dorée: Horn shark: Heterodontus francisci: Heterodontidae: Data Deficient [18] Horn shark at Monterey Bay ...
Identification of the 8 extant shark orders. Shark is the naming term of all members of Selachimorpha suborder in the subclass Elasmobranchii, in the class Chondrichthyes.The Elasmobranchii also include rays and skates; the Chondrichthyes also include Chimaeras.
An egg case or egg capsule, often colloquially called a mermaid's purse, is the casing that surrounds the eggs of oviparous chondrichthyans. Living chondricthyans that produce egg cases include some sharks, skates and chimaeras. Egg cases typically contain one embryo, except for big skate and mottled skate egg cases, which contain up to 7 ...
In most oviparous shark species, an egg case with the consistency of leather protects the developing embryo(s). These cases may be corkscrewed into crevices for protection. The egg case is commonly called a mermaid's purse. Oviparous sharks include the horn shark, catshark, Port Jackson shark, and swellshark. [80] [82]
The Mexican hornshark (Heterodontus mexicanus) is a bullhead shark of the family Heterodontidae. This shark is grey-brown in color, with black spots scattered on the fins and body. It has a cylindrical trunk, conical head, and small spiracles behind the eyes. The snout of the Mexican hornshark is very round and blunt.
The kitefin shark or seal shark, Dalatias licha, is a species of dogfish shark in the family Dalatiidae, and the only species in its genus. It is found sporadically around the world, usually close to the sea floor at depths of 200–600 m (660–2,000 ft). This shark has a slender body with a very short, blunt snout, large eyes, and thick lips.
[1] [2] The capsules are usually deposited at a depth of 20–30 m (66–98 ft), much deeper than the Port Jackson shark, though there is a single record of an egg being found only 8.6 m (28 ft) down. The time to hatching has been variously reported as 5 and 8–9 months; the newly emerged young measure 17–22 cm (6.7–8.7 in) long and ...