Premium Only Content

When Shark Cage Diving Doesn't Go As Planned 🦈 😱 #shark attacks
Sharks, together with rays and skates, make up the subclass Elasmobranchii of the Chondrichthyes. Sharks differ from other elasmobranchs, however, and resemble ordinary fishes, in the fusiform shape of their body and in the location of their gill clefts on each side of the head. Though there are exceptions, sharks typically have a tough skin that is dull gray in colour and is roughened by toothlike scales. They also usually have a muscular, asymmetrical, upturned tail; pointed fins; and a pointed snout extending forward and over a crescentic mouth set with sharp triangular teeth. Sharks have no swim bladder and must swim perpetually to keep from sinking to the bottom.
smooth dogfish
smooth dogfish
hammerhead shark
hammerhead shark
There are more than 400 living species of sharks, taxonomically grouped into 14–30 families, according to different authorities. Several larger species can be dangerous to humans. Numerous sharks are fished commercially. However, overfishing in the late 20th and early 21st centuries substantially reduced the populations of some shark species.
Description and habits
sand shark
sand shark
Observe blacktip and lemon sharks at a shark nursery in French Polynesia and scientists studying on lemon sharks
Observe blacktip and lemon sharks at a shark nursery in French Polynesia and scientists studying on lemon sharksSee all videos for this article
Shark species are nondescript in colour, varying from gray to cream, brown, yellow, slate, or blue and often patterned with spots, bands, marblings, or protuberances. The oddest-looking sharks are the hammerheads (Sphyrna), whose heads resemble double-headed hammers and have an eye on each stalk, and the wobbegongs (family Orectolobidae), whose skin flaps and protective coloration closely resemble the seafloor. The vernacular of shark names indicate colours in living species, such as the blue (Prionace glauca), the white (Carcharodon carcharias; also known as the great white shark), and the lemon (Negaprion brevirostris) shark.
-
LIVE
Sarah Westall
2 hours agoBecause Voluntary Extermination is a Thing: Israel-Gaza w/ Award Winning Journalist James Robins
462 watching -
LIVE
megimu32
1 hour agoOTS: When TV Was Sacred - Nick at Nite & SNICK Nostalgia Night!
458 watching -
LIVE
AlphaZeroOmega
2 hours ago $0.01 earnedDune Awakening: 🏜 We have a fresh Deep Desert to explore! 🏜 | 🚨Rumble Studio Direct RTMP🚨
57 watching -
1:15:18
Glenn Greenwald
4 hours agoTrump Promises More Weapons for Ukraine; Trump Again Accuses Dems of Fabricating Epstein Files | SYSTEM UPDATE #487
95.4K49 -
LIVE
The Sufari Hub
1 hour ago🔴WE WILL BECOME THE STRONGEST IN ALL THE LANDS - !Discord !HITTHATFOLLOW
26 watching -
RiftTV
5 hours agoTrump TRIPLES Down on Epstein COVER-UP.. MAGA Base ERUPTS | The Rift | Sarah Stock & Anna Perez
35.9K6 -
LIVE
CriticalRealms
1 hour agoBarony Gameplay – Ultimate Dungeon-Crawling Chaos!
40 watching -
LIVE
TwinGatz
1 hour ago🔴LIVE - Chill Night w/ The Bears | ARMA: Reforger | Premium Creator
29 watching -
LIVE
BigTallRedneck
1 hour agoHELLDIVERS 2 W/ TYLER TODAY GAMES
143 watching -
LIVE
Phyxicx
3 hours ago100%-ing Gran Turismo 2: A-Spec Mod v1.2 - Finale? - 7/15/2025
34 watching