Although the most often quoted estimate is 20,000 species, scientists and researchers estimate that there may be as many as 20,000 more. Because there are such a great number of fish that have yet to be discovered, it’s hard to estimate what percentage of our fish species still exist in today’s ocean.
Many biologists believe that the populations of large, commercially sought-after fish worldwide have been reduced by as much as 90 percent of their historical size. Scientists are finding that one of the best ways to manage fish is simply to leave them alone. Even when a population has been trawled for years, in most cases if you exempt it from fishing for a while, it will recover.
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