This mod adds:

New 49 fishes
New 6 cooked fishes
"Blazing Fishing Pole" - it can be used for fishing in lava, and give additional luck and lure speed point
Chum Bucket - an early game item to attrack fishes(throw it into the water to decrease lure time for a 5 minutes). It not stackable with lure enchantment effect.
Recipes of luck and experience potions
New echantments
Overrides fishing mechanics.

All of the new and vanilla fishes can be catched only in own types of biomes, dimensions and liquids. Some of them has special crafting recipes. Fishing in rain gives an additional 1 point of lure speed and fishing in thunder gives an additional point of luck.

Additionally this mod adds new enchantments:

"Awakened Rod" - It gives you auto fishing ability.
"Luminous float" - shining bobber.
"Infernal Line" - allows to fish in lava.
"Curse of the abyss" - a chance to catch drowned.
"Curse of false bite" - a chance to catch nothing.
"Curse of scorching line" - ignites you.
"Curse of Misfortune of the Sea" - decrease luck to 10 for every level

Fishing catch:

Catch in desert savanna & mesa:
- Sandy Bass
- Golden Koi
- Sunfish

Catch in jungles:

- Piranha
- Sparkling Ell
- Mandarinfish

Catch in swamps:
- Ruffe
- Mud Tuna
- Swamp Plaice

Catch in snowy biomes & taiga:

- Snowy Walleye
- Frost Minnow
- Glacier Anchovy

Catch in oceans and beaches:
- Blue Jellyfish
- Angelfish
- Squid
- Puffer
- Clown Fish
- Sponge Eater

Additional catch in deap ocean:
- Abyssal Lurker
- Angler fish

Catch in other owerworld biomes:
- Cod
- Salmon
- Catfish
- Pike
- Explosive Crucian

Catch in mushroom biomes:
- Cod
- Squid
- Salmon
- Catfish
- Pike
- Red Shroomfin
- Brown Shroomfin

Catch in dead biomes(there aren't such biomes in vanilla minecraft):
- Green Jellyfish
- Bone Fish
- Cursed Koi
- Spookyfin

Rare catch in the caves:
- Specular Snapper
- Cave Trout
- Crystal Mullet
- Charged Bullhead
- Coal Crucian
- Copper Minnow
- Iron Bass
- Amethyst Catfish
- Emerald Salmon
- Diamond Koi

Catch in the End:
- Ender Shad
- Pearl Sardine
- Chorus Koi

Catch in lava(out of Nether):
- Obsidian Bream
- Magma Jellyfish

Catch in lava(only in the Nether):
- Obsidian Bream
- Magma Jellyfish
- Nether Sturgeon
- Magma Jellyfish
- Quartz Chub
- Fungi Catfish
- Withered Crucian
- Flarefin Koi
- Blaze Pike
- Wither Skull

Blazing Fishing Pole:

This item can't be crafted. There are two ways to obtain it - to find it in the Nether Fortress chests or catch it in the lava.

Compatibility

Other Fishing Mods

This mod is designed to be compatible with other fishing-related mods, but the level of compatibility depends on how those mods modify the fishing system.

Full compatibility

If another mod simply adds new fishing rods without modifying the vanilla fishing mechanics, it should work perfectly alongside Advanced Fishing.

Partial compatibility (loot tables)

If a mod modifies the vanilla fishing loot tables, compatibility will be partial. Advanced Fishing uses its own loot tables for fish, while vanilla tables are only used for junk, treasure, and rare fallback cases when no fish could be caught.

Partial compatibility (fishing mechanics / bobber)

Advanced Fishing replaces the vanilla fishing bobber when a rod is cast.
If another mod also modifies the fishing mechanics or replaces the bobber entity, conflicts may occur.
In such cases, you can disable the config option: OVERRIDE_VANILLA_FISHING
When this option is disabled, Advanced Fishing mechanics, catches, and enchantments will only work when using the Blazing Fishing Pole, allowing both mods to coexist.

Other mods:

This mod allows other mods to define custom fishing rules for their own fluids.
Mod developers can specify custom loot tables, fluid particles, and bobber behavior.
This makes it possible to restrict fishing to specific rods, create unique catches, or customize how fishing works in different liquids.

Gravestone - Extended

If the mod Gravestone - Extended is installed, many fish gain additional brewing recipes, allowing them to be used for creating new potions. Furthermore it adds its own type of fluid with special catch and 2 new fishing rods.

Link to Minecraft forum thread.

My other mods: