"Halaelurus hispidus"

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http://eprints.cmfri.org.in/view/subjects/Shark.html
Items where Subject is "Demersal Fisheries > Shark fisheries"
WebApr 27, 2024 · CMFRI Newsletter No.63 January- March 1994, 63. p. 8. Brar, Sukhdev (1998) On a whale shark landed at Paradeep, Orrisa. Marine Fisheries Information Service, Technical and Extension Series, 155. p. 20. Burman, Bijoy Krishna (1994) Landing of a …
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Shark
Group of elasmobranch fish
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Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks …
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Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha and are the sister group to the Batoidea. Some sources extend the term "shark" as an informal category including extinct members of Chondrichthyes with a shark-like morphology, such as hybodonts. Shark-like chondrichthyans such as Cladoselache and Doliodus first appeared in the Devonian Period, though some fossilized chondrichthyan-like scales are as old as the Late Ordovician. The oldest confirmed modern sharks are known from the Early Jurassic, about 200 million years ago, though records of true sharks may extend back as far as the Permian.
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How Sharks Keep Our Oceans Healthy
Sharks are a group of elasmobranch fish with a cartilaginous skeleton and five to seven gill slits on the sides of their head. They have been around for over 400 million years and have evolved into more than 500 different species.
Life cycle
Shark birth
Sharks can be born live, hatched from eggs, or emerge from egg cases.
Shark migration
Some sharks migrate long distances for food, mating, or temperature changes.
Shark feeding
Sharks have different diets, hunting strategies, and adaptations for feeding.
Shark sensory system
Sharks have keen senses of smell, hearing, sight, taste, touch, and electroreception.
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Distinctive species
Bull Shark
Each whale shark’s spot pattern is unique as a fingerprint.
Smallest species
Dwarf Lantern shark
Largest species
Whale Shark
When you flip a shark upside down it goes into a trance-like state called tonic immobility.
They can have up to 30,000 teeth over their lifetimes.
They have the thickest skin of any animal species. Some sharks have skin that is 6 inches thick.
The largest ever predatory shark was Carcharodon megalodon, which was around 53 ft (16 m) long, with a mouth perhaps 6 ft (2 m) wide.
Evolution history
Scales dating to about 420 million years ago, during the Silurian period, are generally accepted as the oldest shark scales on record.
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Scalloped hammerheads are critically endangered due to overfishing and bycatch. They are highly valued for their fins and meat.
Scalloped hammerhead
Sawfish are critically endangered and some species may be extinct in the wild. They are threatened by habitat loss, fishing, and use of their saw-like rostrum in traditional medicine and as souvenirs.
Sawfish
Whale sharks are endangered and face population decline due to fishing, accidental capture, and boat strikes. They are the largest living fish and feed on plankton and small fish.
Whale shark
Great white sharks are vulnerable and have a low reproductive rate and long maturation period. They are targeted by trophy hunters and suffer from habitat degradation and pollution.
Great white shark
Oceanic whitetip sharks are vulnerable and have experienced a severe decline in numbers due to overfishing and bycatch. They are highly prized for their fins and are often victims of shark finning.
Oceanic whitetip shark
Image: Getty Images. Data: Wikipedia · Sketchfab.com · en.wikipedia.org · fisheries.noaa.gov · animals.mom.me · sharksider.com · guinnessworldrecords.com
Wikipedia text under CC-BY-SA license
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Items where Subject is "Demersal Fisheries > Shark fisheries"

Shark

Life cycle

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