1.   And in the Bay of Bengal off Bangladesh, satellite imagery has shown that higher water temperatures cause plankton blooms that carry cholera epidemics.

2.   But he said other scientific studies have shown that this sea floor venting causes vast plankton blooms and huge plumes of warm water welling up from the bottom.

3.   Drawn by large plankton blooms and krill that have been stirred up by El Nino, the humpbacks are breaching and nosing up to boats in the area.

4.   Then satellite observatories could monitor the ocean surface to see if the eruptions and quakes lead to plankton blooms and ocean warming.

5.   The Victorian Fisheries Research Institute said Tuesday the unprecedented plankton bloom was swept to the surface by a huge upwelling of deep cold water over the past month.