This is how I clean the bigger fish :
2 saw horses with a wooden board ( with side edges raised , and slanted ).
A plastic sheet wrap at the end of of board, direct the bloody water into a 5 gal bucket.
Since my backyard is concrete slab, I don't want blood all over.
The bloody water can be used to fertilize my fruit tree in other area.
Works for me !
http://www.bigwatersedge.com/bwevb/a...1&d=1464367994