Happy to help.
Good luck at CC. I hesitate to recommend any specific course, but an intro to biology or ecology would probably be worthwhile if you're taken by the more scientific side of fishkeeping. Depending on where you live, there may be specific courses on things like aquaculture, fish-farming, animal welfare, and ornamental fish care.
Careers in science are difficult to get for a variety of reasons, not least of which is that there's many more students after jobs than there are actual jobs! Given the choice, it's wisest to pick courses that would help you get a better job, and then leave science for the hobby side of your life. Two fields I'm involved in, astronomy and palaeontology, operate very much like this, with many amateurs learning and doing the science they enjoy during their spare time. This approach is a lot more fun than scraping a living as a "professional" scientist.
Do find out if your public library can get hold of a book called "
Diversity of Fishes" by Gene Helfman, Bruce Collette and Douglas Facey. In my opinion this is by far the best single-volume book on fish biology. It covers just about everything from the behaviour of predators through to the evolution of bichirs. Although a technical book, it's quite easy to read and has lots of diagrams. I use this book all the time! Like a lot of college-level text books it's pricey (around $100) but used copies cost far less. If you want a "taste" of fish science, I can't recommend this book too strongly.
Cheers, Neale
and neale, thanks so much for ur help, its been very interesting that i may pursue a course at my community college to learn more... any particular course u suggest ?