This is an interesting article. Traditionally, seismic surveys are done with long floating trailers of geophones. The reception is very noisy, so they have to compensate with really big booms from the air-guns. This, of course, makes the fishie people mad, even though it may not bother the fish and whales (or maybe it does!).
One summer, I had so much fun doing marine seismic. KABOOM! went the air-guns. We were once in Oshawa Harbour, and the fishies (salmon?) were jumping all over the place for some reason. KABOOM! We tested the air-guns, and not a fish was seen for quite some time, over the whole harbour! Neat!
Anyway, back to the story. These guys are pushing laying the geophones right on the bottom of the lake or ocean. Then you get better signal to noise. If you are developing a field, then install them permanently, since they tell you a lot about production. Of course, you might not be able to compromise with the fishie people....