I started fishing and keeping fish about the same time so it's a draw for me. I have made a living doing both( breeding fish and making fishing lures to catch fish.) I believe, what made me a better aquarist was the need to understand the wild fish's habits in order to catch them. What made me a better lure maker was my understanding of what fish need (in a tank) to survive so I could understand better how to catch them in the wild. I'm not sure if one begot the other first tho. lol
I do draw the line at eating fish that I have kept in an aquarium. I don;t want to see a slab of Oscar fillet on a plate even tho I have been told they taste better than Bass. lol Most of the marine fish I've kept are eaten in many countries but I just can't bring myself to doing it. It was a real eye opener when I went to the local Fish markets in Belize and the Bahamas. I saw more "aquarium" fish than I thought I would have. Goes to show you, we keep in little glass containers, fish that grow big enough to eat those containers. :^o Isn't that little red tail cat so cute???