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Mantis shrimp eyes

ryanblakeley.net

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Re: Mantis shrimp eyes

#5
post #3

Obligatory Oatmeal comic about the Mantis Shrimp: https://theoatmeal.com/comics/mantis_shrimp

Obligatory Ze Frank vid: https://www.youtube.com/watch?v=F5FEj9U-CJM

The Oatmeal claims that, "the mantis shrimp sees a thermonuclear bomb of light and beauty." This piece contradicts that claim:

"Mantis shrimp have twelve photoreceptor classes. Humans have three. We derive a spectrum of colors through comparisons between our three classes; this is called the opponent process or opponency. Mantis shrimp do not do this. They collapse the spectrum into just twelve colors."

Re: Mantis shrimp eyes

#6
post #3

Obligatory Oatmeal comic about the Mantis Shrimp: https://theoatmeal.com/comics/mantis_shrimp

Obligatory Ze Frank vid: https://www.youtube.com/watch?v=F5FEj9U-CJM The Oatmeal claims that, "the mantis shrimp sees a thermonuclear bomb of light and beauty." This piece contradicts that claim: "Mantis shrimp have twelve photoreceptor classes. Humans have three. We derive a spectrum of colors through comparisons between our three classes; this is called the opponent process or opponency. Mantis shrimp do not do thi…

I’d forgotten about Ze. Wow, what a wild ride his 365 day vlogging experiment was. It was the first and most precious thing I did everyday for almost a year.

Re: Mantis shrimp eyes

#7
post #3

Obligatory Oatmeal comic about the Mantis Shrimp: https://theoatmeal.com/comics/mantis_shrimp

Obligatory Ze Frank vid: https://www.youtube.com/watch?v=F5FEj9U-CJM The Oatmeal claims that, "the mantis shrimp sees a thermonuclear bomb of light and beauty." This piece contradicts that claim: "Mantis shrimp have twelve photoreceptor classes. Humans have three. We derive a spectrum of colors through comparisons between our three classes; this is called the opponent process or opponency. Mantis shrimp do not do thi…

Ya, that's a lovely comic, but it appears to be a misconception. That comic is actually specifically called out in the book on page 107.

It's more like a 12 color lookup table.

> Every kind of red stimulates the bottom receptor of row 3. All shades of violet stimulate the top receptor on row 1

That's based on an experiment where they were trained to attack colored lights for a reward.

The comic also says they have 16 color receptors, but the other 4 (2 in the midband and 2 in the hemispheres), as far as anyone knows, aren't involved in color vision.

Re: Mantis shrimp eyes

#8

Earlier quoted context omitted.

Obligatory Ze Frank vid: https://www.youtube.com/watch?v=F5FEj9U-CJM The Oatmeal claims that, "the mantis shrimp sees a thermonuclear bomb of light and beauty." This piece contradicts that claim: "Mantis shrimp have twelve photoreceptor classes. Humans have three. We derive a spectrum of colors through comparisons between our three classes; this is called the opponent process or opponency. Mantis shrimp do not do thi…

Ya, that's a lovely comic, but it appears to be a misconception. That comic is actually specifically called out in the book on page 107. It's more like a 12 color lookup table. > Every kind of red stimulates the bottom receptor of row 3. All shades of violet stimulate the top receptor on row 1 That's based on an experiment where they were trained to attack colored lights for a reward. The comic also says they have 16…

Would they be able to distinguish between a light that is pure orange (a single 600nm wave length) and a light that is a mix of red and yellow that gives humans the perception of orange?

If so, I think that's still kind of a cool thing to think about.

Re: Mantis shrimp eyes

#10

Earlier quoted context omitted.

Ya, that's a lovely comic, but it appears to be a misconception. That comic is actually specifically called out in the book on page 107. It's more like a 12 color lookup table. > Every kind of red stimulates the bottom receptor of row 3. All shades of violet stimulate the top receptor on row 1 That's based on an experiment where they were trained to attack colored lights for a reward. The comic also says they have 16…

Would they be able to distinguish between a light that is pure orange (a single 600nm wave length) and a light that is a mix of red and yellow that gives humans the perception of orange? If so, I think that's still kind of a cool thing to think about.

It is my understanding that a mix of red and yellow frequencies would trigger the corresponding yellow and red-sensitive receptors, if it has them, but not orange.
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