Fishing is completely custom some notable drops from fishing are: Seashells (Contains sea food items and Pearl gemstones), alchemy materials, currency, and general mc items. (Enchantment books, Armor, etc are not available in the fishing droptable) 

Drop Table: Ink Sac, Glowing Ink Sac, Raw Cod, Raw Salmon, Lily Pad, Seagrass, Kelp, Copper Coin, Silver Coin, Fishing Rod, Name Tag, Slimeball, Prismarine Shard, Sea Pickle, Waxed String, Seashell, Sea Serpent, Rare Fish Scale