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#1
03-29-2008, 09:55 PM
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Ignore my ignorance here please
What is the reason a saltwater fish will not survive in FW.????
Something to do with the gills? My buddy just asked me after seeing my tank and i cant give a good answer.
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72 Gallon Bowfront Reef.. Hardware:2x250w Luminex Elite HQI Reflectors (Phoenix Hexarc Bulbs), Galaxy 2x250w Electronic ballast, Euroreef 130 Skimmer, Sedra KSP 7000 Retern... Live Stock: Pair of Hawaiian Flame Wrasse, Leopard Wrasse, Pink Streaked Wrasse, Pair True Percula Clowns, Potters Angel, African Flameback Angel, Orange Fin Tomini Tang, Yellow Assessor, Tailspot Blenny, Purple Firefish.. 45 G FW Asain Barb Community tank. 
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#2
03-29-2008, 10:31 PM
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start here http://en.wikipedia.org/wiki/Osmoregulation
Last edited by mark; 03-29-2008 at 10:35 PM.
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#4
03-29-2008, 11:16 PM
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And, some fish have the ability to move between marine and freshwater environments. One very common example is Salmon. Another is the common Molly, which can live quite comfortably in either, and switch back and forth.
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#5
03-30-2008, 01:30 AM
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Although those that switch from fresh to salt or vice versa have to undergo some pretty intense internal physiological changes and must be acclimated. You cant just dump a molly in saltwater and expect it to live long.
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#6
03-30-2008, 02:05 AM
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Quote:
They Can...Salmon  Seriously though Salt... Osmosis is a term used to describe the physical property exhibited when a difference in concentration exists on either side of a semipermeable membrane. This is stuff we learned in high school but forgot. Water will flow through the membrane in the direction that will try to equalize the differences in concentration. So, water will pass through the membrane, moving from the side of low concentration to the side with the higher concentration. This is the same mechanism that is working in your fish question. The salt water fish will die because too much water is entering it's body. The fresh water fish will loose water when placed in salt water. NOTE TO SELF..READ WHOLE THREAD TO SEE IF PEOPLE ALREADY GAVE YOUR SAME ANSWERS
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