Karin, the word you are looking for is "scythe". Yep, I know how to operate one 
My worst job ever was last year, when I stepped in to help another local contractor replace sewer lines under a commercial building. This building is over 100 years old, and is pier and beam. The reason I got called is I am the only one local who is small enough to fit under the building. Did I mention that the sewer lines were ruptured and draining under the building (for MONTHS)? And that there was a 75 gpd water leak under there too. Yes, it involved being flat on my belly, dragging myself around in the, um, mud, yeah we will call it that. While dragging sections of 4" sch40 pvc and all my needed equipment and tools. I made good money on that job. It wasn't enough.
Support marine aquaculture, and share with your friends! Then you will find out who they really are.