Fish survived but it bled about a quart of dark red almost black, thick motor oil blood all over the back deck of my boat. Took about 3-4 washings with Advanage to get it clean.
Those things are almost bullet proof. I’ve seen them out of the water for a long time baking in the sun and when you put them back in the water they swim away like nothing happened.
When I get blood on the floor of my boat, I spray it down with a hose and its gone. That’s the big advantage of having the polymer-vinyl hard surface as opposed to carpet!