“Eye-ball” takes on a whole new meaning…
18 Mar 2012, Posted by Ashley Mooney in News, 0 Comments
When it’s all about keeping your eye on the ball, having eyes as big as the ball—like giant and colossal squids—certainly does not hurt.
Now, the name of the game is different for different species. Instead of balling, these squids use their huge eyes to spot and escape their predators: sperm whales. Massive eyes allow the squid to collect more light, improving their ability to detect small contrast differences. Their super-vision stretches across “freakishly long distances” of 120 meters, said Duke biologist Sönke Johnsen in a release.
“Giant squids have watermelons for eyes,” Shikha Nayar, a sophomore with superior-sized eyes, said. “If we had eyes that big, we could see much further into the distance and have better peripheral vision—we’d be like seahorses.”
Maybe not like seahorses, but instead like the ichthyosaurs—a swimming dinosaur—according to the release. Ginormous eyes may have helped the extinct marine dinosaur detect large targets lurking in the dimness.
Using photos and captured animals, Johnsen and his team measured the eyes of the squids. They also collected data on water clarity and the amount of light where the squid live, which is usually between 300 to 1,000 meters under the sea, the release said.
The study was published Mar. 15 in Current Biology. The researchers also working on a more detailed model of the mechanics of deep sea vision, to be published later this year.
With their work, they have shown how giant and colossal squids truly redefine the word “eye-ball.”





