Originally Posted by AUFishman
His muscle mass is fine. The difference between 40 inches and 200 inches is pretty insignificant when you consider where the wild caught fish came from to begin with. It has great color and finage, feeds agressively, no disease, and it gets along well with its tank mates. So yes, the fish is doing great, there's no debate about that. I'm just saying the popular opinions don't always hold true in every instance. Obviously, when dealing with a smaller tank you need to be very careful what other types of fish you introduce. That being said, keeping a solitary yt in a 55 gallon tank is not an act of futility.
Actually, the difference between 40" and 200" is very significant in closed marine systems. It is the difference between animals living to adulthood healthy and happy...and animals living shortened lifespans dying prematurely from disease and/or stress.
Some anaimls will thrive in smaller systems while others cannot.
Sure, they seem to be happy for some period...and every now and then one survives for an extended period..
There is a diffeence between living and surviving. Those animals placed in systems too small are surviving...those placed in adequate sized systems are living.
JMO