Fishing Loot Table (1.9 pre-2)

/*
* Base fishing table to determine which of the sub-tables to use.
*/

{
    "pools": [
        {
            "rolls": 1,
            "entries": [
                {
                    "type": "loot_table",
                    "name": "minecraft:gameplay/fishing/junk",
                    "weight": 10,
                    "quality": -2
                },
                {
                    "type": "loot_table",
                    "name": "minecraft:gameplay/fishing/treasure",
                    "weight": 5,
                    "quality": 2
                },
                {
                    "type": "loot_table",
                    "name": "minecraft:gameplay/fishing/fish",
                    "weight": 85,
                    "quality": -1
                }
            ]
        }
    ]
}

/*
* Junk.
*/

{
    "pools": [
        {
            "rolls": 1,
            "entries": [
                {
                    "type": "item",
                    "name": "minecraft:leather_boots",
                    "weight": 10,
                    "functions": [
                        {
                            "function": "set_damage",
                            "damage": {
                                "min": 0,
                                "max": 0.90
                            }
                        }
                    ]
                },
                {
                    "type": "item",
                    "name": "minecraft:leather",
                    "weight": 10
                },
                {
                    "type": "item",
                    "name": "minecraft:bone",
                    "weight": 10
                },
                {
                    "type": "item",
                    "name": "minecraft:potion",
                    "weight": 10
                },
                {
                    "type": "item",
                    "name": "minecraft:string",
                    "weight": 5
                },
                {
                    "type": "item",
                    "name": "minecraft:fishing_rod",
                    "weight": 2,
                    "functions": [
                        {
                            "function": "set_damage",
                            "damage": {
                                "min": 0,
                                "max": 0.90
                            }
                        }
                    ]
                },
                {
                    "type": "item",
                    "name": "minecraft:bowl",
                    "weight": 10
                },
                {
                    "type": "item",
                    "name": "minecraft:stick",
                    "weight": 5
                },
                {
                    "type": "item",
                    "name": "minecraft:dye",
                    "weight": 10,
                    "functions": [
                        {
                            "function": "set_data",
                            "data": 0
                        }
                    ]
                },
                {
                    "type": "item",
                    "name": "minecraft:tripwire_hook",
                    "weight": 10
                },
                {
                    "type": "item",
                    "name": "minecraft:rotten_flesh",
                    "weight": 10
                }
            ]
        }
    ]
}

/*
* Treasure.
*/

{
    "pools": [
        {
            "rolls": 1,
            "entries": [
                {
                    "type": "item",
                    "name": "minecraft:waterlily",
                    "weight": 1
                },
                {
                    "type": "item",
                    "name": "minecraft:name_tag",
                    "weight": 1
                },
                {
                    "type": "item",
                    "name": "minecraft:saddle",
                    "weight": 1
                },
                {
                    "type": "item",
                    "name": "minecraft:bow",
                    "weight": 1,
                    "functions": [
                        {
                            "function": "set_damage",
                            "damage": {
                                "min": 0,
                                "max": 0.25
                            }
                        },
                        {
                            "function": "enchant_with_levels",
                            "levels": 30,
                            "treasure": true
                        }
                    ]
                },
                {
                    "type": "item",
                    "name": "minecraft:fishing_rod",
                    "weight": 1,
                    "functions": [
                        {
                            "function": "set_damage",
                            "damage": {
                                "min": 0,
                                "max": 0.25
                            }
                        },
                        {
                            "function": "enchant_with_levels",
                            "levels": 30,
                            "treasure": true
                        }
                    ]
                },
                {
                    "type": "item",
                    "name": "minecraft:book",
                    "weight": 1,
                    "functions": [
                        {
                            "function": "enchant_with_levels",
                            "levels": 30,
                            "treasure": true
                        }
                    ]
                }
            ]
        }
    ]
}

/*
* Fish.
*/

{
    "pools": [
        {
            "rolls": 1,
            "entries": [
                {
                    "type": "item",
                    "name": "minecraft:fish",
                    "functions": [
                        {
                            "function": "set_data",
                            "data": 0
                        }
                    ],
                    "weight": 60
                },
                {
                    "type": "item",
                    "name": "minecraft:fish",
                    "functions": [
                        {
                            "function": "set_data",
                            "data": 1
                        }
                    ],
                    "weight": 25
                },
                {
                    "type": "item",
                    "name": "minecraft:fish",
                    "functions": [
                        {
                            "function": "set_data",
                            "data": 2
                        }
                    ],
                    "weight": 2
                },
                {
                    "type": "item",
                    "name": "minecraft:fish",
                    "functions": [
                        {
                            "function": "set_data",
                            "data": 3
                        }
                    ],
                    "weight": 13
                }
            ]
        }
    ]
}