Anyone uncertain about the scope of the human footprint in the ocean just needs to do a deepsea trawl off the coast of southern California.   During a government fish survey, we pulled up everything from weather instruments, army helmets and canteens, to bottles, cans and boots.  The ocean is big, but it can only hide so much if we use it as a dumping ground.  Who knows,  though – maybe these would make good habitat for a shoe crab.  They’re not a matched set, but in a pinch…