Alien Sharks: Dogfish and Sleeper Shark

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'Shark Week': Alien Sharks- Dogfish and Sleeper Shark

Lucky for us shark lovers, some bait and a camera situated on the sea floor offer a rare glimpse at two lesser-known sharks: a roughskin dogfish and a sleeper shark.
Sleeper and Dogfish sharks
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Alien Sharks: Dogfish and Sleeper Shark
Greenland Sleeper Shark, Somniosus microcephalus, and diver. St. Lawrence River estuary, Canada. Wild & unrestrained shark. (MR) (374)

The first to emerge from the murky darkness at the corner of the screen is the 5-foot long roughskin dogfish. Down in the pitch black sea, its glowing eyes allow it to see despite the darkness.

"There is no sunlight at these depths but organisms make light through biological mechanisms using phosphorus," Dr. Greg Stone explains.

As the cameras descend even deeper, a fearless giant appears from the darkness: a pacific sleeper shark. As the biggest shark in the deep, these alien creatures can grow to over 20 feet in length – bigger than even the biggest great white shark.

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The Discovery Channel
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