Greenland Ugly

The Greenland shark (Somniosus microcephalus) provides for a double dose of ugly. The shark, which dwells in arctic waters, is no beauty contest winner. Its pebbly hide and prehistoric appearance alone make it a good candidate for residency at Ugly Overload.

But the ugly doesn't start there. That's because most Greenland sharks are host to small crustacean parasites called copepods. These parasites attach themselves to the shark's cornea and do permanent damage to the eye, resulting in partial to complete blindness.


Photo source: Nick Caloyianis via National Geographic




















But there is a silver lining to be found in these murky depths. Greenland sharks are also called sleeper sharks, because they are so slow-moving. So slow, that they can be dragged aboard with one's bare hands. So how in the world have they been found with squid and other fast-moving fish in their gullets? One theory is that the parasite, which dangles out of the eye like a worm, might serve as a lure for other fish, thereby allowing the shark to get close enough for an ambush attack. How's that for symbiosis?

Photo source: Nick Caloyianis via National Geographic



























But then, that doesn't explain the seal, reindeer, polar bear, and even horse parts found inside the shark's belly. Just goes to show that we have a lot to learn. It also goes to show that not even polar bears can feel too safe when taking a moonlit stroll along the banks of the St. Lawrence River.

Thanks for the links, Rebecca.