A fishing net may be collected from the beach between the fishing areas, but will not be kept on leaving the island. Catch the correct "fishlike thing" as told by the Servant and use the uncooking pot to make it raw. Talk to Bob and he will eat it if it was caught from the correct area. If you use a cooked shark, the same applies to salmon and is assumed to apply to all fish on the uncooking pot you will get a message that says something like "you need level 50 in uncooking, wait you dont have that skill" Using a raw fish on the pot will result in "this is already raw".