Most of the ornamental outfits, heck the food ones too, tend to be pretty tight lipped about a lot of that stuff. At the same time, with a little leg work it is not hard to go through supply catalogs and such and start figuring out a lot. There are a couple of good periodicals out there that often have good articles, such as Aquaculture Magazine and Hatchery International. Some the best info could probably be found through Sea Grant, for marine ornamentals I would suggest looking up Florida Sea Grant.
BTW there is a standing joke among professional aquaculturists.....
How do you make a million dollars in aquaculture?
Start with 2 million
