When the comb jelly, Mnemiopsis leidyi, was accidentally introduced into the Black Sea, what eventually happened to the Black Sea ecosystem? (Site 1)

When the comb jelly, Mnemiopsis leidyi, was introduced into the Black Sea, its population exploded to 500 comb jellies per cubic yard in 1988. The jellies devoured all the zooplankton and fish larvae, drastically reducing the numbers of the native fish populations.

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