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Why do bass turn dark after fighting on the line?

Posted on 8/30/19 at 9:18 am
Posted by weagle99
Member since Nov 2011
35893 posts
Posted on 8/30/19 at 9:18 am
I assume it is oxygen depletion? Or is it amino acid?

The fish swim away but is it harmful to them? Mainly on the belly looking dark.

ETA: Smallmouth. You can actually see the stomachs turn darker in the water
This post was edited on 8/30/19 at 10:09 am
Posted by bbvdd
Memphis, TN
Member since Jun 2009
24928 posts
Posted on 8/30/19 at 9:21 am to
I always (unscientifically of course) thought it was because they were pissed off.
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
81592 posts
Posted on 8/30/19 at 9:31 am to
They don't.
Posted by lsupride87
Member since Dec 2007
94834 posts
Posted on 8/30/19 at 9:46 am to
From my experience

Bass near grass mats and cover are dark green. I always assumed its camouflage

Those bayou black bass are a dark dark green coming out of that grass
This post was edited on 8/30/19 at 9:47 am
Posted by PillageUrVillage
Mordor
Member since Mar 2011
14724 posts
Posted on 8/30/19 at 9:50 am to
Bass, like us, get darker or lighter based on sun exposure.

I’ve never seen one get darker just from fighting.
Posted by bbvdd
Memphis, TN
Member since Jun 2009
24928 posts
Posted on 8/30/19 at 9:52 am to
Smallmouth definitely do.
Posted by PillageUrVillage
Mordor
Member since Mar 2011
14724 posts
Posted on 8/30/19 at 9:55 am to
I’ve never smallmouth fished, so I’ll take your word for it.

Here’s an article about how largemouth bass change their pigment.
LINK
This post was edited on 8/30/19 at 10:05 am
Posted by weagle99
Member since Nov 2011
35893 posts
Posted on 8/30/19 at 10:06 am to
quote:

They don't.


My experience today, and almost every day fishing, disagrees with you

ETA: Mainly talking about smallies
This post was edited on 8/30/19 at 10:08 am
Posted by weagle99
Member since Nov 2011
35893 posts
Posted on 8/30/19 at 10:07 am to
quote:

Smallmouth


Thanks that was what I was referencing. I will clarify the OP
Posted by Buck_Rogers
Member since Jul 2013
1828 posts
Posted on 8/30/19 at 10:08 am to
Just curious of how you know they weren't dark before the fight?
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
81592 posts
Posted on 8/30/19 at 10:08 am to
quote:

My experience today, and almost every day fishing, disagrees with you
This doesn't even make sense. Did you see the fish before it bit?
Posted by weagle99
Member since Nov 2011
35893 posts
Posted on 8/30/19 at 10:09 am to
I fish in clear water and can see the stomachs get darker as they fight

This post was edited on 8/30/19 at 10:11 am
Posted by bbvdd
Memphis, TN
Member since Jun 2009
24928 posts
Posted on 8/30/19 at 10:09 am to
When you pull one out of the water you can sit there and watch them darken.

ETA: when you pull one out of the water their belly is almost white.

In a few seconds it will start to darken with black and brown splotches.
This post was edited on 8/30/19 at 10:12 am
Posted by weagle99
Member since Nov 2011
35893 posts
Posted on 8/30/19 at 10:11 am to
quote:

Just curious of how you know they weren't dark before the fight?


I can see them turn darker while fighting.

A smallie has a light colored stomach. After a prolonged fight (which I try to avoid) they have dark gray color.
Posted by PillageUrVillage
Mordor
Member since Mar 2011
14724 posts
Posted on 8/30/19 at 10:11 am to
From the article I posted.

quote:

According to the US Department of Energy's "Ask a Scientist!" Program, bass have receptors in their eyes that detect varying levels of light and cue changes in the pigment cells of the skin. The fish's eyes receive reflected light from its surroundings and this often triggers a hormonal release in the skin to either move the pigment closer to the surface of the skin or further away.


It was referencing largemouth, but I wonder if it’s the same for smallies. Maybe just coming to the surface and being exposed to more sunlights causes their pigment change?
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
81592 posts
Posted on 8/30/19 at 10:15 am to
quote:

Maybe just coming to the surface and being exposed to more sunlights causes their pigment change?
It's this. Also, clear water. That's why they can get dark in the dark livewell.
Posted by Lonnie Utah
Utah!
Member since Jul 2012
23843 posts
Posted on 8/30/19 at 10:16 am to
Chromatophores
This post was edited on 8/30/19 at 10:16 am
Posted by yatesdog38
in your head rent free
Member since Sep 2013
12737 posts
Posted on 8/30/19 at 10:16 am to
didn't believe you
but now

LINK
Posted by weagle99
Member since Nov 2011
35893 posts
Posted on 8/30/19 at 10:18 am to
quote:

It was referencing largemouth, but I wonder if it’s the same for smallies. Maybe just coming to the surface and being exposed to more sunlights causes their pigment change?





Interesting, thanks for the link. Hopefully that is what is happening and stress on the fish isn’t too bad. Although I really like the ‘they are angry’ theory

Thanks for all the replies everyone
This post was edited on 8/30/19 at 10:21 am
Posted by rilesrick
Member since Mar 2015
6704 posts
Posted on 8/30/19 at 2:02 pm to
They were dark before they bit it.
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