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Old 11-21-2003, 11:15 PM   #11
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How about this nice pond fish, the longear sunfish? 8)

(Image source: www.conservation.state.mo.us)
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Old 11-21-2003, 11:19 PM   #12
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those make pretty good aquarium fish as well i had a 55 with them in it and they were some of the most interactive fish i ever had! and i caught them myself LOL
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Old 11-21-2003, 11:20 PM   #13
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I agree that it is probably to blend in with the environment. Think about where most of the FW fish come from - rivers and lakes, thus the lighter colored undersides and darker, more earth toned topside. As previously noted, a lot of the SW fish we see are reef fish, where the corals are brightly colored.

All in all, most of any fish's day is spent looking for food - and avoiding being eaten. Blending in with your surroundings make you much less of a target. 8O
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Old 11-21-2003, 11:21 PM   #14
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Agreed stoneydee!

hehe cool possum, I grew up next to a pond and caught a few of my tank inhabitants as well.....
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Old 11-21-2003, 11:30 PM   #15
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Man i go to the lake and just scoop with my net and catch all sorts of cool stuff!!

loads of grass shrimp for the fish to eat too
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Old 11-22-2003, 12:03 AM   #16
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Quote:
Originally Posted by snapcrackler
How about this nice pond fish, the longear sunfish? 8)

(Image source: www.conservation.state.mo.us)
nice looking fish but a miniatus grouper has got it beat
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Old 11-22-2003, 12:05 AM   #17
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Great question!! IMO SW tropicals have brillaint intense coloration. Not so for temperate water SW fish. If you think about the number of species that exist in the tropics (not just fish but birds, reptiles, mammals), they are almost all very colorful. And I think it has more to do with recognizing their own kind, and attracting a mate then anything else.

Perhaps the reason FW tropicals don't have the intense coloration of SW has to do with the clarity of the water they are from. South American rivers and streams are murky, whereas the waters of lake malawi must be clearer. Just a thought.
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Old 11-22-2003, 01:19 AM   #18
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Killifish are extremely colorful freshwater fish. For example:



That's an aphyosemion australe. There are other equally (or even MORE) colorful killies.
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Old 11-23-2003, 12:45 AM   #19
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First: *Sati* I don't think Lori meant that salt water itself makes the fish look brighter, I think she meant that fish have adapted differently to light conditions over billions of years because of different refraction/diffusion properties of salt water.

My opinion is that it may have to do with *pH* and dissolved metals. Just a hypothesis, and not one that's supported by all instances (e.g. Lake Victoria). I'm wondering if the ions present in saltier/higher pH water enable the fish to brighten their colors. Prime examples of this apart from the oceans are Lakes Malawi and Tanganyika. This may be an issue of difference in water/light properties or a biochemical difference.

And though I agree with Alli in principle, I've still gotta say that if you walk into a fish store with FW on one side and SW on the other, you've got a huge difference in brilliance of coloration. Though fish like killies, cardinal tetras, bettas, clown loaches are colorful, I believe FW fish are a little less vibrant. Are they less cool as a result? Certainly not!!! I'm much more interested by the morphology, breeding habits, behavior of FW fish!

No FW inferiority complex here--I'm very happy with my fish!
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Old 11-23-2003, 02:05 PM   #20
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If I had to guess. I would say that SW fish have had millions of years to develop and as you may know a fishs' colors are mostly for attracting mates (most fish not all) and over this long period through evolution the fish have developed very vibrant colors (survival of the fitest).
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