Jellyfish blooms are they caused primarily by global warming or over fishing or something else?

it just makes sense that the ways we are exploiting our nature combined with the greed , naturally causes equilibrium in the nature. nature is just like an organ and when misused it has to some how repair it self and in order to do that many biological, chemical , physical and changes has to take place. there is no doubt that we are destroying our nature by keep poisoning it with the current rate! it is only common sense! jellyfish increase or decrease in numbers shouldn't be necessary to prove this simple fact or reality! peace