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Message
Why is red an advantageous color in evolution for bottom fish ?
Posted on 4/15/23 at 5:55 pm
Posted on 4/15/23 at 5:55 pm
So red is the first color to disappear underwater. I’m sure someone can explain that to me better, so the red snapper and other red fish in the Gulf of Mexico are now white sooner than any other color. But there are white fish? So why would white not be more advantageous ?
I honestly don’t know I’m just curious?
I honestly don’t know I’m just curious?
5
Posted on 4/15/23 at 6:11 pm to baldona
There are no red snapper left in the Gulf of Mexico. Ask the Ocean Conservancy.
Posted on 4/15/23 at 6:34 pm to baldona
Is it advantageous? I had never heard that. Seen lots of Red Snapper at depth along with the other fish. They’re no less visible.
Posted on 4/15/23 at 6:47 pm to baldona
quote:Black sooner. That's the advantage.
so the red snapper and other red fish in the Gulf of Mexico are now white sooner than any other color.
Posted on 4/17/23 at 9:09 am to baldona
Posted on 4/17/23 at 9:14 am to SloaneRanger
quote:
Is it advantageous? I had never heard that. Seen lots of Red Snapper at depth along with the other fish. They’re no less visible.
There’s a lot of red reef fish in the gulf. Brown also but I’d assume brown matches the bottom?
If you watch a video of the bottom by a diver, go pro, etc the ‘red’ fish turn to white.
So my question is why would evolution not just make them white?
Posted on 4/17/23 at 5:23 pm to baldona
quote:White would not blend in as well. Most fish are countershaded to help with camouflage in both directions (up/down).
So my question is why would evolution not just make them white?
Posted on 4/17/23 at 5:42 pm to baldona
Maybe some/fish see red in a different color and are attracted to it?
Posted on 4/18/23 at 6:49 am to baldona
quote:Again, black.
red’ fish turn to white.
Posted on 4/18/23 at 8:05 am to AlxTgr
quote:
Again, black
Here's a picture. Whatever color it is, its not red. Not white, sure. I agree the red changes darker. But again, there are Amberjack that are dark brown, grouper, Mangrove snapper, etc.
Posted on 4/18/23 at 8:45 am to baldona
There's a lot of light in that picture. This is an easy search: "red turns black water".
First hit: NOAA
First hit: NOAA
quote:
Why are so many deep-sea animals red in color?
Red light does not reach ocean depths, so deep-sea animals that are red actually appear black and thus are less visible to predators and prey.
quote:
When struck by white light, a red fish at the surface reflects red light and absorbs all other colors and thus appears red. However, the deeper you and the fish go, the less red the fish will appear, because there is less and less red light to reflect off of the fish. At 100 meters, red light does not penetrate and, at this depth, a red fish is difficult, if not impossible to see. Instead, the fish appears blackish because there is no red light to reflect at that depth, and the fish absorbs all other wavelengths of color.
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