Minecraft wiki entry for Bucket_of_aquatic_mob, associated text: Tropical fish also have assigned names that can be seen after capture. In Java Edition, the smaller text under the item name is displayed showing the fish name, similar to the text that displays enchantments under enchanted items. In Bedrock Edition, the item name is displayed showing "Bucket of <fish name>". Their colors are mostly named according to the colored block names, though with a few exceptions: