It works a little bit different with 3D objects such as people, add to that the movement and shadows... What the fish don't see is the actual "picture" on the tv the way we do, so to term it "watching tv" would not be accurate.
I should also mention that different species of fish have various degrees of eyesight, some see better than others. I have done a great many experiments with fish and their ability to see objects outside of the tank because I was always intrigued by how they followed me when I walked past their tank. The results were very interesting, some were surprising. The distance you are from the tank also makes a difference, as does ambient room lighting.
If you turn on your aquarium lights and look through the tank from the side instead of the front.. you will notice that you see more mirror image of what is in the tank than what is on the other side of the glass. If you look down through the top of the tank, through the water, what you see is different than if you look straight through the glass. When you shine light on the tank and attempt to look through, again, it is different. The way light rays penetrate through glass and react through the water is rather fascinating... if you're into that sort of thing. There is also a difference depending on spectrum of light.
Sorry I don't have the time to be anymore specific than that... but it makes for some good experiments for someone to try on their own.
Dawn
Dawn Moneyhan
Aquatics Specialist/Nutritionist
To learn more about me go to
http://www.helium.com/users/449334
--- On Tue, 12/21/10, Larry Blanchard <labl@comcast.net> wrote:
From: Larry Blanchard <labl@comcast.net>
Subject: Re: [tropical fish club] Replacing dead fish is not an easy task
To: tropicalfishclub@yahoogroups.com
Date: Tuesday, December 21, 2010, 6:04 PM
On 12/21/2010 02:41 PM, Dawn Moneyhan wrote:
> In regards to the fish watching tv, you should know that unless your tank is within about 6 - 10 inches from the tv screen, the fish cannot see it. Anything beyond that distance they see mostly just shadows if they see anything at all.
It may be just shadows, but my rainbows can certainly tell when I'm
sitting in my favorite chair, about 3-4 feet from the aquarium. They
watch me patiently till I get up and then they get all excited. They
associate my action with being fed, even though many times I get up and
don't feed them.
--
It's turtles, all the way down!
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