Shrimp aren't the only things that belong on the barbie. Any fish cut into a steak can be grilled, as can shellfish like clams and oysters. If you're a novice seafood griller, start with a thick-skinned fish like tuna, swordfish or shark. Their sturdy exterior makes them easy to flip and hard to overcook (unlike cod, for example, which is so delicate that it can fall apart or dry out on the grill). From there, work your way up to scallop skewers and shrimp kabobs, and if you're a seasoned seafood chef, grab your grill basket and experiment with fish fillets. Regardless of your level of expertise, there's an undersea creature that's right for your grill.