Solved! Where did the Big Eye In The Sea come from?

No doubt you have seen the lonely big eye in the sea story by now.  A giant eyeball washed ashore on a Florida beach and then the internet went crazy.  So what is it? I emailed Sönke Johnsen a Professor of Biology and colleague of mine at Duke University.  Sönke is an expert on everything visual in marine organisms including transparency, cryptic coloration, bioluminescence, ultraviolet protection, and of course vision.  He responded

I’m fairly sure it’s just the eye of a large [Xiphiidae or Istiophoridae], likely a swordfish or marlin. They get seriously big, but people don’t realize it because most of the eye is inside the head.

He then went a step further and then emailed a few of his colleagues

talked with some colleagues — definitely a swordfish eye

There you have it.  New reports on the eye also mention the presence of bones which obviously rules out the giant squid!

So does this mean I win the internet?

Dr. M (1625 Posts)

Craig McClain is the Assistant Director of Science for the National Evolutionary Synthesis Center, created to facilitate research to address fundamental questions in evolutionary science. He has conducted deep-sea research for 11 years and published over 40 papers in the area. He has participated in dozens of expeditions taking him to the Antarctic and the most remote regions of the Pacific and Atlantic. Craig’s research focuses mainly on marine systems and particularly the biology of body size, biodiversity, and energy flow. He focuses often on deep-sea systems as a natural test of the consequences of energy limitation on biological systems. He is the author and chief editor of Deep-Sea News, a popular deep-sea themed blog, rated the number one ocean blog on the web and winner of numerous awards. Craig’s popular writing has been featured in Cosmos, Science Illustrated, American Scientist, Wired, Mental Floss, and the Open Lab: The Best Science Writing on the Web.





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88 comments on “Solved! Where did the Big Eye In The Sea come from?
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  7. I was pretty sure the very first post I saw suggested this was a squid eye–interesting to find out it is really from a marlin or swordfish. It does look like that to me. Very, very cool stuff. Now to solve the rest of the mystery–where is the rest of the fish?

  8. It does look as if it’s from a swordfish. I’ve seen a lot of these fish and I recently happened to take photos of swordfish on a market stall in Catania, Sicily. My photos aren’t uber close up, but I can see that the eyeball above is pretty similar to those on my photos. Must have been a darn big fish though!

  9. If you read midway into the article (and those of you who do, are intelligent of course) you will notice it says:

    “New reports on the eye also mention the presence of bones which obviously rules out the giant squid!”

    This is not the eye of a giant squid.

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