there are two reasons why there are

there are two reasons why there are so few species of tank-raised marine ornamental fishes in the aquarium trade.the first and most significant is that it is not easy to culture marine fishes,especially to develop the skills necessary to be successful.only a few species lend themselves to culrure far from the sea,and it is expensive in both time and dollars to engage in this pursuit for either fun or profit.the tech-nology to culture some of the most-prized species--angelfish,tangs,and butterflyfish for example--is still in development,the culture of these species by hobbyists is still the impossible dream.the second,most important to a commercial venture,is that only a few species enjoy the ex-tensive market demand,ease of culture,and high stable price to support the effort and expense of commercial culture.