Go back to fly fishing
It is time for lobby fishing. Grab a lobster pot and head to Karamja by taking the ship from Port Sarim which costs 30gp. Either drop your lobsters, or go back to Draynor Village to bank them. You could even cook them on a fire sell them to the local shop if you really want to make some money. Lobsters will be quite slow at level 40, so if you want kal online geons you can go back to fly fishing.