MARINE FISH
There are almost 20,000 species of marine fish in the world, but only a small
minority is of any interest to the aquarist. Of these, most come from the Pacific
and Indian oceans, although a few are native to Australia and the tropical Atlantic
ocean. Marine fish are usually collected in their natural environment and rarely
reproduce in captivity. They find it more difficult to acclimatize than freshwater
fish, particularly as regards feeding: some refuse to eat artificial food, and others
have very special dietary requirements. The smallest marine fish require a minimum
water volume of 150-200 liters. Medium-sized species (around 20 cm) must he kept
in tanks of 300 liters, or at least 400 liters if they are active. It is advisable
to obtain juvenile (or sub-adult) specimens, as they are generally easier to acclimatize
and feed.
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