While cleaning and filleting fish in sand fly country I found that wearing a net over my head and neck, a latex surgical glove on my knife hand, and a Kevlar filleting glove on the other keeps the pesky critters from distracting the hell out of me. Initially I put a surgical glove on both hands but found I couldn't get a good grip on the fish, and it kept slipping away from me - so I put a Kevlar glove on my holding hand.  Problem solved.

Hold the fish by the tail and insert the blade into the anus of the fish. Pull the blade through the belly of the fish, and upwards right through the position where the gill rakers meet (this junction of bony tissues is quite a tough joint). Place the fish on a board and cut through the back of the fish down through the backbone, without cutting the head off and not cutting right through.

Your fishing line needs Sun Protectant too. Do you protect your fishing line from damaging sunlight, most fishermen never give this a passing thought. Sunlight will not only give you a sunburn, it will also give your fishing line sunburn. The UV rays which are harmful to your skin are just as harmful to your fishing line. This means every kind of fishing line: spinning monofilament, tapered flylines and leader tippet.