AAAS is a partner of HINARI, AGORA, OARE, CHORUS, CLOCKSS, CrossRef and COUNTER. 1992 Jun;212(3):213-56. doi: 10.1002/jmor.1052120304.

So the team investigated the muscles that allowed the guitarfish to accomplis this funky feat.

That’s almost as much as the diameter of the eyeball itself and likely more than any other vertebrate, How systemic racism shaped the ecosystems of U.S. cities, Astronomers spy galaxies caught in the web of a voracious black hole, How stigmatizing disease—from COVID-19 to HIV—creates a vicious cycle of sickness, NASA mission set to sample carbon-rich asteroid, Newly found viruses suggest rubella originated in animals, With to-do list checked off, U.S. physicists ask, ‘What's next?’, A call to test new vaccines head to head, in monkeys, American Association for the Advancement of Science.

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Eye retraction behavior has evolved independently in some vertebrate linages such as mudskippers (fish), frogs and salamanders (amphibians), and cetaceans (mammals).

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mBio. Frogs can retract them about half the diameter of the eyeball, the second most impressive distance measured after the guitarfish. But how retraction works in batoid fishes, which don’t have retractor bulbi, remained unknown. Contracting what’s called the retractor bulbi eye muscle allows bottlenose dolphins and some frogs and salamanders to retract their eyeballs; mudskippers can sink their eyes into their head completely to keep their peepers moist above water. That might guarantee a win in a staring contest, but it does pose problems for eye protection in the sandy, tropical waters where the creature … Keywords: The giant guitarfish can retract is eyeballs nearly 1.6 inches back into its heads, almost as far as the diameter of the eyeball itself, reports Emily DeMarco for Science. Since the guitarfish hunts for prey on the ocean floor, this feature protects the eye from sand and bits of coral.
Right eye in normal (i) and retracted (ii) positions. 2016 May 19;4(3):e00391-16. Giant guitarfishes (and wedgefishes) are considered to be shark-like rays.The term ‘shark-like rays’ refers to 62 species from five families in the order Rhinopristiformes: the sawfishes (Pristidae),wedgefishes (Rhinidae), giant guitarfishes (Glaucostegidae), guitarfishes (Rhinobatidae), and banjo rays (Trygonorrhinidae). Eye retraction behavior has evolved independently in some vertebrate linages such as mudskippers (fish), frogs and salamanders (amphibians), and cetaceans (mammals). Edgeworth's legacy of cranial muscle development with an analysis of muscles in the ventral gill arch region of batoid fishes (Chondrichthyes: Batoidea). Due to such muscle arrangement, the obliquus inferior can pull the eyeball ventrally. Total length = 280 centimeters (110 inches).

Read more --, NASA mission set to sample carbon-rich asteroid, Newly found viruses suggest rubella originated in animals, With to-do list checked off, U.S. physicists ask, ‘What's next?’, A call to test new vaccines head to head, in monkeys, American Association for the Advancement of Science. Scientists trace these odd morphologies through evolutionary lineages to learn how specialized traits evolve and how creatures are related.

It can be recognized by its elongated and pointed snout, large eye spots above each pectoral fin, rows of white dots lining its greyish back, and tall, shark-like dorsal fins. Genome Announc. Change ), You are commenting using your Google account.

Now, new research shows that guitarfish can thank a specialized eye muscle for that ability. In fact, except for the banjo rays, the remaining four families are considered amongst the top shark and ray families most at risk of extinction.

Tomita T, Murakumo K, Komoto S, Dove A, Kino M, Miyamoto K, Toda M. PLoS One. Video: Giant guitarfish eye gymnastics By Emily DeMarco Oct. 16, 2015 , 2:00 PM Like sharks, the giant guitarfish doesn’t have eyelids that close all the way, so it can’t blink.

Time to add oddball eyeballs to the list of amusing evolutionary adaptations. 1994 Jan 22;339(4):587-97. doi: 10.1002/cne.903390409. National Center for Biotechnology Information, Unable to load your collection due to an error, Unable to load your delegates due to an error.

What are giant guitarfish? or But that’s not the oddest thing about this fish. , almost as far as the diameter of the eyeball itself, So why does the guitarfish have such a dramatic skill? Other animals, including frogs, bottlenose dolphins, and mudskippers, also retract their eyes, but employ a different mechanism.

The team also dissected two dead guitarfishes to study the arrangement of the eye muscles and used CT scanning to create a 3D reconstruction.

Photographs From the Last Quiet Places on Earth.

So why does the guitarfish have such a dramatic skill? Vote Now! Advertising Notice

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