Oh thats OK then, mine are always thrown away with Labrador poo in the bottom, so they would be the right way up, and probably sink.
Just googled, there are orange jellyfish! None look like a JS carrierbag.
On a more sensible note, can anyone quantify the effect on UK carrierbags entering the oceans of the world? Let alone killing Turtles? Compared with the brutal fishing methods employed accross the world I suspect the effect is minimal, but am happy to see evidence if someone has it.
The other thing to consider with all plastics is the effect of micronised plastics in the foodchain.
Still compared with the vast amounts of fuel and other plastic crud we use I stand by the point that carrierbags are just a sop to calm middleclass guilt.