Still painting fish in the off season

Very nice yellow perch rendition!

One minor point: Yellow perch are physoclists. They don't vent excess gas bubbles out via their alimentary tract from their swim bladder, since they don't possess a pneumatic duct. Most soft-rayed fish (physostomes) do this; hence the bubbles. Perch, as well as most spiny-rayed fish possess an thin sphincter muscle band, called the Oval Organ, that alters the extent of surface area exposure for gas exchange into their blood stream via a capillary bed (Rete Mirable). They don't handle swift vertical movements well.

Or, why spiny-rayed species caught and pulled to the surface from depths greater than 1 atmosphere generally have their stomachs extruded from the mouths and their eyes "bugged out"
 
Very nice yellow perch rendition!

One minor point: Yellow perch are physoclists. They don't vent excess gas bubbles out via their alimentary tract from their swim bladder, since they don't possess a pneumatic duct. Most soft-rayed fish (physostomes) do this; hence the bubbles. Perch, as well as most spiny-rayed fish possess an thin sphincter muscle band, called the Oval Organ, that alters the extent of surface area exposure for gas exchange into their blood stream via a capillary bed (Rete Mirable). They don't handle swift vertical movements well.

Or, why spiny-rayed species caught and pulled to the surface from depths greater than 1 atmosphere generally have their stomachs extruded from the mouths and their eyes "bugged out"
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But do they ever burp? I'm sure that was where Scott was going with the bubbles.
 
Very good to know...

But I can guarantee that the thought of "perch sphincter" never entered my mind

Tod was correct...those bubbles are the result of a recently consumed Emerald shiner
 
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The painting made me smile. I like your work, and about the air bubbles, it's art/personal expression. As Bob Ross always said "it's your world". Folks laughed at him and he laughed all the way to the bank.
 
My point as well, physoclists don't burp bubbles, physostomes can, and do. Think of the last lake trout you saw get "horsed" to the surface from deep water. What preceeded his ascent prior seeing the fish? The same thing you would do on a free ascent, after dropping your weight belt, if you were a scuba diver who has experienced a regulator malfunction or run out of tank air. Why? To offset the expansion of air left in your lung field as ambient pressure declines during the ascent. Scared the hell out of me the first time I did it in practice from fifty feet down...never ran out of air prior hitting the surface.

A consumed emerald shiner would not generate gas, "dissolving" slowly in the GI tract( I only analyzed a few thousand fish stomach contents over ten years as a field research. fish biologist.). Scott, the Oval Organ just exposes more or covers less of the Rete Mirable capillary bed network, increasing or decreasing rate of gas exchange from the swim bladder into the blood stream...no gas bubbles get vented to the GI tract as a result of this process.
 
I can see that, during my absence, the forum has taken on a more technical slant. I can only imagine how Harker would respond to the topic of "perch sphincters"
In the future, I will refrain from adding bubbles, I will make an effort to act like cloacas do not exist, and leave them out of every future work AND I will definitely not add anything that remotely resembles a sphincter, other than the artist's signature itself.
I appreciate the biology lesson but now I have to go away for a while again.
:-)
 
If a fish burps and no one sees it, did it really burp?

But more importantly, do fish flatulate???
 
My suspicion is what Scott was trying to portray is the fish was just caught and released, and therefore had bubbles trapped...

As for the technicalities, I'm sure Travis would have some other bodily function to comment on...
 
My suspicion is what Scott was trying to portray is the fish was just caught and released, and therefore had bubbles trapped...

As for the technicalities, I'm sure Travis would have some other bodily function to comment on...

HAHA! That made ME smile. I thought of Travis and his potential response to these posts.
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I am certainly glad that my brief stopover triggered some truly enlightened conversation.


Not sure what I'll paint next, now that I've become such a catalyst, but I'll try to make it good
 
Nice Perch Scott.

I do know my aquarium fish have flatulence, I have seen my Platies fart many a time.
I would name your painting "Just Released". I have often seen a fish when returned to the water take a gulp or two. Air bubbles that are clinging inside the mouth and gills come out. It could also be the a rare surface feeding Perch. I've watched enough Bluegills and Bass in aquariums to know bubbles come out for a while after they gulp something off of the surface.

Tim
 
So what yer sayin' is in your absence, the technical sphincter has tightened...

Paint what ya like, how ya like. Bubbles, Sphincters and all.
 
I like it for it's artistic merit. Also, as far as I'm concerned, those are not bubbles at all ----- they are "thinking balloons". Of course they're small - fish don't think big thoughts.
 
So what yer sayin' is in your absence, the technical sphincter has tightened...

Paint what ya like, how ya like. Bubbles, Sphincters and all.



Apparently ;-)
And yes of course I will do that...Ive been called ugly before
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Before I got married, my wife helped my Mother by doing some sprucing up in her apartment. She wallpapered her bathroom with a fish motif. The paper was upside down and the bubbles from the fishs mouth we're going down. We just called them pearls.
Two days later she wallpapered the living room and put the fleur de le motif also upside down.
 
Scott,how cute...and petty! As I stated, a minor point of clarification. Yes, I bruised your artistic ego. You wouldn't paint a mallard with a black bill. Why? It isn't authentic and doesn't depict the species. Why do the same thing with a yellow perch?

Realism is...realistic!

Todd, your comments constitute high praise, particularly when you consider your track record on this forum. You are a true rough cut gem...or, you just have a monster dose of small man complex!
 
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