Handling fish leaves a less than pleasant smell on your hands.
Cut a fresh lemon into wedges. After you are finished handling the fish, squeeze the lemon onto your hands, rub your hands together, and rinse with water.
This compound is also successful at breaking down odors. Just splash and rub this on your hands to remove any residual odor. As a final step, be sure to rinse hands afterwards to remove any lingers smell of vinegar.
Pour a small amount of baking soda within your hands and rub it in thoroughly under the kitchen faucet. Finally, wash all of the substance away to reveal freshen hands.