Minecraft wiki entry for Superflat_survival, associated text: A cheaper alternative to buying two buckets of fish is to buy one and then buy kelp, which can convert water into source blocks, costing you 8 emeralds instead of 10. In Bedrock edition, you can buy 1 bucket of fish then capture the fish with bucket and place it down since catching the fish doesn't remove the water source. This costs 5 emeralds and you can get a fish, which you can eat if it is a tropical fish. If it is a pufferfish, you can sold to fisherman villager, or it can be used to breed cats. Also a novice fisherman villager (job block: barrel) has chance to buy 3 emeralds for a cod bucket, which not only gets water but also get raw cod, which you can eat. Also, tropical fish; pufferfish and cod have a chance to drop bone meal‌[Java Edition only] or bone.‌[Bedrock Edition only]