Add Bone Fishing Pole, which can be used for fishing in the toxic water.
It should be possible to enchant it with new enchantment - "Hellish Angling", which should allows to fishing in the lava.

TODO:

• Bone Fishing Pole
• Fishing in the Toxic Water
• Hellish Angling enchantment and fishing in the lava
• Catch should not burns at fishing in the lava

New fisherman's catch in water:

• Blue Jellyfish
• Specular Fish (at the level of 50 blocks or deeper in the caves)
• Frost Minnow (in cold biomes)
• Piranha (in jungles)
• Mud Tuna (in swamps)
• Golden Koi (in desert)
• Enderfin (in the End)
• Pearl Bass (in the End / rare)
• Chorus Koi (in the End / very rare)
• Cavefish (at the level of 40 blocks or deeper in the caves)
• Angler Fish (at the level of 25 blocks or deeper in the caves)
• Explosive Crucian
• Ruffe (in swamps)
• Sparkling Eel (in jungles)
• Angelfish (in ocean)
• Sponge Eater (in deep ocean)
• Snowy Crucian (in cold biomes)
• Squid
• Sandy Bass (in desert)

New fisherman's catch in toxic water:

• Bone (junk)
• Rotten Flesh (junk)
• Spider Eye (junk)
• Bonefish
• Green Jellyfish
• Spookyfin
• Cursed Koi
• Skeleton and Zombie Skulls (treasure)
• Enchanted Skull (treasure)

New fisherman's catch in lava:

• Obsidifish
• Magma Jellyfish (rare)
• Flarefin Koi (only in Nehter)
• Nether Salmon (only in Nehter)
• Quartz Cod (only in Nehterr / rare)
• Blaze Cod (only in Nehter / very rare)
• Withered Crucian
• Wither Skeleton Skull (treasure)
• Withered Enchanted Skull (treasure)

Recipes for new fishes:

• Bonefish -> 1 Pile of Bones
• Green Jellyfish - > 3 Toxic Slime
• Mud Tuna - > 4 Clay Balls
• Sandy Bass - > 1 Sand
• Magma Jellyfish -> 1 Magma Cream
• Magma Jellyfish + Bucket -> Bucket of Lava
• Nether Salmon - > 1 Netherrack
• Flarefin Koi - > 2 Glowstone Dust
• Quartz Cod - > 4 Quartz
• Blaze Cod - > 1 Blaze Rod
• Enderfin - > 1 Ender Stone
• Pearl Bass - > 1 Ender Pearl
• Chorus Koi - > 1 Chorus Fruit
• 4 Obsidifish - > 1 Obsidian block
• 4 Sponge Eater - > 1 Sponge block
• Snowy Crucian - > 4 Snowbals
• Squid - > 5 black dye
• Explosive Crucian - > 3 gunpowder
• 4 Frost Minnow - > Ice block
• 2 Frost Minnow + 2 Ice block - > 2 Packed Ice block
• 4 Withered Crucian - > Soul sand block
• Angler Fish ????

Furnace recipes:

• Any fish - > Cooked Salmon

Usage in potions #67 :
Specular Fish - > Recall Potion
Bonefish -> Bone Skin Potion
Piranha -> Bleeding Potion
Blue Jellyfish - > Nausea Potion
Green Jellyfish -> Obstruction
Cursed Koi -> Cursed Flame Potion
Magma Jellyfish -> Burning Potion
Spookyfin -> Blindness Potion
Golden Koi -> Potion of Purification
????