Life on earth cannot survive without oxygen this is true
even for fish. Water has a set amount of oxygen, if this level drops; then
there is no way the fish can filter out the oxygen thru there gills. This then courses
the fish to suffocate to death. One example of this can be seen in 2011 on
Redondo Beach marina in California. Millions of sardines died due to a dead
zone. The water did not circulate in the marina and all the biomass created by
the influx of fish spiked the CO2 level in the water. This in turn created a mass die off of fish
because of the dead zone created by the biomass.
Images of a dead zone in action!
(Photo: Lucy Nicholson/Reuters)
(By currentblips)
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