To join in a little late on the fresh fish thing, fresh fish should not smell like fish. Also, if you are buying the fish whole, it should have clear eyes, have firm skin that springs back when you touch it, the scales shouldn't come off when you rib the fish the wrong way, and the gills shoud be pink or red. In my food prep class, when we had 3 fresh salmon, I tried to smell them to see what a fresh fish should smell like, it smells kind of oceany, I think. (This is why I LOVE being a Culinary Arts student. I feel so smart in conversations like this!)
Also, fun thing to do with fish...
Take one salmon fillet. I suppose that you could use any other kind of fish if you arn't a huge salmon fan. Take one sheet of parchment paper, fold in half, cut into half heart shape. Unfold, now you have a heart. How pretty. Anyways, smother one side of the paper with melted butter. This is so the paper doesn't light on fire in the over. Place salmon on one side of the heart. Place spices and herbs etc with the fish (For the record, putting a bay leaf under the salmon, putting rosemary and also some really thin, peeled lemon slices on the fish tastes GREAT). Fold heart in half agian, with the fish still inside. Fold over the edges to that during cooking, it will not open. This is important, because the fish will basically be steaming in there, and the paper will look like a balloon when you're done cooking it. Butter the outside of the heart, agian, if you dont, you will have a fire. You place the half heart in the oven, on a pan. Cook until done, I forget exactly how long, but when you think it should be done, cut a whole in the paper, and if the fish flakes easily (not falling apart, just easily flaked) its done. Yummy. Plus, when you open the heart, it smells awsome.
Another great thing about being in Culinary Arts is that we get to eat our food. Yum.