Marine biological catastrophes?

Few anthropocentric phenomenons are as frustrating to realize as the systematic depletion of every form of biomass from the oceans. It has been well known now for decades that we are overfishing and extracting reproductive organisms faster than they have the chance to reproduce. Species such as blue-fin tuna, cod and eel are almost completely vanished from our oceans. Not to mention that all the worlds fishing stocks have been depleted up to 70% (average value). But sadly, there are other issues of concern:

Now, the next ancient masters of the oceans, the sharks, are also endangered. One of the largest causes for shark decline is the demand for the fin which, in the East, is a delicacy in soups. And the method for fin production? Capture the shark - cut of the fin - release the shark again into the ocean with absolutely no chance of survival. At the AAAS meeting (American Association for the Advancement of Science) in Boston recently, additional causes for shark decline were presented - such as sharks captured as a side-effect of modern efficient fishing boats sucking up large contents of the oceans.

Another exciting scientific statement presented at the AAAS meeting deals with contraceptive pills and their connection to reproductive abnormalities in fish. Gender switches among fishes are not in fact the only marine environmental consequence; contraceptive pills, comprising their hormone molecules, lead indirectly to extinction of fishes (as their reproduction is out of order).