fishing

what the crap's a thermocline

A thermocline is a cold water layer typically between the shallow and deep waters. The shallow waters are usually too warm for fish, while the deeper water is too cold and compressed to hold enough oxygen for fish. Fish tend to stay in the thermocline.

And yes, sometimes the thermocline can get inverted, evidenced by the yearly alewife kill in the great lakes, where the fish get trapped by warmer water, and die by the millions.

would this thermocline be seen by the naked eye extending accross the water. what we saw at the surface was an area of water that looked different than the rest of the water arround it. it was calmer and trapped dead fish and debris in it. also we were only in 30 ft of water

I have seen those from the air too. They seem to be bodies of water void of oxygen for some reason, possibly nutriet fueled pollution. They appear almost black. Some areas can get quite large.