Wanna tip?
Buy the least expensive black rubber front door welcome mat.... the ones that look like thousands of little pencil erasers on top and smooth on the bottom. Then, cut it to fit flush side to side and right where the drip slope starts. The fish will never slip. The mat will never get cut by the knife. It will rinse completely clean with one or two shakes in the water. It dries quickly. Never stinks. It can still be used to wipe feet before entering the cabin..... It is one of the best under $10 (usually $5) hacks of all time. I'm still using the same one for 15 years.
Your board looks GREAT.