| Abalone | Advanced III | Rare | Saltwater | Raptor Dive Pass • Frostbunny Park • Muros Media Park • Highcliff Temple |
| Amberjack | Advanced IV | Normal | Saltwater | Frozencrest • Cave of Eternity • Queenstown • Crystalfrost Wall • Igloo Hill |
| Anchovy | Beginner I | Normal | Saltwater | Lith Harbor • Alikar |
| Axolotl | Advanced III | Exceptional | Freshwater | Whistler Cliffs |
| Barbel | Intermediate III | Normal | Freshwater | Ellinia • Decor Haven • Orne Town • Eileen Town • Trinket Woods • Ellin Town • Ellin Grove |
| Bitterling | Advanced III | Rare | Freshwater | Whistler Cliffs |
| Black Drum | Beginner II | Rare | Saltwater | Victoria Runway sub-map (Tria) |
| Black Porgy | Advanced IV | Rare | Saltwater | Frozencrest • Cave of Eternity • Queenstown • Crystalfrost Wall • Igloo Hill |
| Black Snakehead | Advanced III | Rare | Unique Biome | Chronoff Train Station • Whistler Cliffs |
| Blackback Butterflyfish | Intermediate II | Exceptional | Saltwater | Goldus Pharmaceuticals |
| Blooming Axolotl | Beginner I | Exceptional | Saltwater | Lith Harbor |
| Blowfish | Intermediate I | Rare | Saltwater | Silverstone Bridge • Resortville • New Goldus |
| Blue Starfish | Intermediate II | Epic | Saltwater | Goldus Pharmaceuticals |
| Blue-Spotted Mudskipper | Beginner III | Epic | Saltwater | Sylvan Woods Trail |
| Blueback Whale | Master | Exceptional | Unique Biome | Gloomy Forest |
| Bluegill | Intermediate II | Rare | Freshwater | Mounthill • Fellowstone Construction |
| Broccoturtle | Beginner I | Exceptional | Freshwater | Turtcoli Cave |
| Calico Koi | Advanced IV | Epic | Freshwater | Ant Tunnel Passage • Steamerbrook • Water Supply Center • Harrot Hill |
| Catfish | Advanced IV | Normal | Freshwater | Ant Tunnel Passage • Steamerbrook • Water Supply Center • Harrot Hill |
| Cherry Salmon | Advanced II | Normal | Freshwater | Mirror Castle • Ellua Riverside • Ellosylva • Twilight Moon Castle • Forelle Town • Greenia Falls • Rose Castle • Ludibrium Crevasse |
| Cobitis | Advanced I | Normal | Freshwater | Ellua Forest Path • Corona Lake • Forest of Lost Memories • Lava Springs • Godspring • Fungeeburg Stump • Ellin Ruins • Verdant Heights • Breezy Hills |
| Crimson Piranha | Advanced IV | Normal | Unique Biome | Lava Crest • Darkmist Path • Lavaluna Cave • Wailing Mine • Magma Trail • Magma Gorge • MSL Electronics Institute • Blazing Forest |
| Crimson Sea Bream | Master | Normal | Saltwater | Coco Island |
| Crucian Carp | Beginner II | Normal | Freshwater | Beauty Street • Hushwood Vale • North Royal Road • Middleton |
| Cutlassfish | Advanced I | Normal | Saltwater | Precipice Fortress • Sand Dunes |
| Cuttlefish | Intermediate IV | Rare | Saltwater | Henesys Docks |
| Cyprinid | Beginner II | Rare | Freshwater | Beauty Street • Hushwood Vale • North Royal Road • Middleton |
| Dalmatian Koi | Advanced III | Epic | Freshwater | Whistler Cliffs |
| Deathstar | Advanced IV | Normal | Unique Biome | MSL Robot Dev Center • Moldy Hollow • Demonspring • Sealed Forest • Calamitysnare • Victoria Liner • Wallowville • Black Forest • Piercing Wind Hills • Stormy Hills |
| Devil's Horn | Advanced III | Normal | Unique Biome | Chronoff Train Station • Whistler Cliffs |
| Devilotl | Master | Rare | Unique Biome | Gloomy Forest |
| Dolphin | Intermediate IV | Epic | Saltwater | Henesys Docks |
| Eel | Advanced I | Rare | Freshwater | Ellua Forest Path • Corona Lake • Forest of Lost Memories • Lava Springs • Godspring • Fungeeburg Stump • Ellin Ruins • Verdant Heights • Breezy Hills |
| Fat Innkeeper Worm | Intermediate III | Exceptional | Saltwater | Ellbo's Hollow |
| Fat Perch | Beginner I | Normal | Unique Biome | Evansville |
| Fiery Sardine | Beginner IV | Normal | Unique Biome | Lavaworks |
| Fiery Whale Shark | Advanced IV | Epic | Unique Biome | Lava Crest • Darkmist Path • Lavaluna Cave • Wailing Mine • Magma Trail • Magma Gorge • MSL Electronics Institute • Blazing Forest |
| Flathead Grey Mullet | Intermediate II | Normal | Saltwater | Goldus Pharmaceuticals |
| Flying Fish | Advanced III | Normal | Saltwater | Raptor Dive Pass • Frostbunny Park • Muros Media Park • Highcliff Temple |
| Footballfish | Master | Epic | Saltwater | (Chaos) Moonlight Fortress |
| Freshwater Bream | Intermediate II | Exceptional | Freshwater | Mounthill • Fellowstone Construction |
| Freshwater Sleeper | Beginner III | Rare | Freshwater | Fairy Tree Lake • Revoldic Dam |
| Golden Abalone | N/A | Rare | Special | |
| Shiny Golden Abalone | N/A | Rare | Special | |
| Golden Bream | N/A | Normal | Special | |
| Shiny Golden Bream | N/A | Normal | Special | |
| Golden Clam | N/A | Rare | Special | |
| Shiny Golden Clam | N/A | Rare | Special | |
| Golden Conch | N/A | Rare | Special | |
| Shiny Golden Conch | N/A | Rare | Special | |
| Golden Dolphin | N/A | Exceptional | Special | |
| Shiny Golden Dolphin | N/A | Exceptional | Special | |
| Golden Koi | Master | Epic | Freshwater | Healing Forest • Perion Hospital • Centura Cave |
| Golden Lobster | N/A | Normal | Special | |
| Shiny Golden Lobster | N/A | Normal | Special | |
| Golden Mandarin Fish | Advanced II | Rare | Freshwater | Mirror Castle • Ellua Riverside • Ellosylva • Twilight Moon Castle • Forelle Town • Greenia Falls • Rose Castle • Ludibrium Crevasse |
| Golden Octopus | N/A | Exceptional | Special | |
| Shiny Golden Octopus | N/A | Exceptional | Special | |
| Golden Ricefish | N/A | Normal | Special | |
| Shiny Golden Ricefish | N/A | Normal | Special | |
| Golden Seahorse | N/A | Normal | Special | |
| Shiny Golden Seahorse | N/A | Normal | Special | |
| Golden Seaweed | N/A | Rare | Special | |
| Shiny Golden Seaweed | N/A | Rare | Special | |
| Golden Starfish | N/A | Exceptional | Special | |
| Shiny Golden Starfish | N/A | Exceptional | Special | |
| Golden Turtle | N/A | Exceptional | Special | |
| Shiny Golden Turtle | N/A | Exceptional | Special | |
| Gray Sea Pineapple | Advanced II | Rare | Unique Biome | Debloon Ranch |
| Great White Shark | Intermediate IV | Exceptional | Saltwater | Henesys Docks |
| Greenling | Intermediate III | Normal | Saltwater | Ellbo's Hollow |
| Grubby Gudgeon | Intermediate III | Normal | Unique Biome | Blackout Expanse |
| Halibut | Beginner III | Rare | Saltwater | Sylvan Woods Trail |
| Hermit Crab | Intermediate II | Normal | Saltwater | Goldus Pharmaceuticals |
| Horse Crab | Beginner IV | Epic | Saltwater | Beachway 111 • Barrota Port |
| Horse Mackerel | Beginner II | Normal | Saltwater | Victoria Runway sub-map (Tria) |
| Hot Blowfish | Advanced III | Rare | Unique Biome | Fractured Canyon • Taliskar • Magma Research Station |
| Humpback Whale | Advanced IV | Epic | Saltwater | Frozencrest • Cave of Eternity • Queenstown • Crystalfrost Wall • Igloo Hill |
| Jailfish | Beginner I | Epic | Saltwater | Alikar |
| Jellyfish | Intermediate I | Exceptional | Saltwater | Silverstone Bridge • Resortville • New Goldus |
| Killamari | Intermediate IV | Rare | Unique Biome | Occupied Fellowstone |
| Killer Whale | Advanced II | Epic | Saltwater | Tidepool Cliffs • Barbosa Beach • Rainbow Mountain • Cheliska Bay • Tortuga Seaside Cliffs • Serene Docks |
| Knight Fish | Beginner I | Exceptional | Freshwater | Tria |
| Koi | Intermediate I | Exceptional | Freshwater | Nerman Forge • Logger's Hill • Henesys • Aner Park • Majore Lake Park • Blooming Farm • Flora Avenue • Oasis Town |
| Largemouth Bass | Intermediate I | Rare | Freshwater | Nerman Forge • Logger's Hill • Henesys • Aner Park • Majore Lake Park • Blooming Farm • Flora Avenue • Oasis Town |
| Lava Bass | Intermediate IV | Normal | Unique Biome | Paruvan Plateau • Hotottot River • Molten Hourglass • Windsong Ravine • Picardiv |
| Leaf Fish | Advanced III | Normal | Freshwater | Whistler Cliffs |
| Littleneck Clam | Beginner III | Normal | Saltwater | Sylvan Woods Trail |
| Lobster | Advanced I | Exceptional | Saltwater | Precipice Fortress • Sand Dunes |
| Machodile | Intermediate III | Epic | Saltwater | Van Corta Dungeon |
| Mackerel | Beginner IV | Normal | Saltwater | Beachway 111 • Barrota Port |
| Mantis Shrimp | Intermediate III | Rare | Freshwater | Ellinia • Decor Haven • Orne Town • Eileen Town • Trinket Woods • Ellin Town • Ellin Grove |
| Masked Parexus | Master | Rare | Saltwater | Blueshade Cave |
| Mecha Shark | Intermediate I | Epic | Freshwater | Nerman Forge |
| Minnow | Intermediate IV | Normal | Freshwater | Ant Tunnel Entrance • Forgotten Keep • Prism Falls • West Wind Hill • Razed Forest • West Watchtower • Picchu Picchu Gardens • Baum Tree • Serpent Town |
| Mucky Mudskipper | Master | Normal | Unique Biome | Coco Island • Obsidian Mount • Melta Dam • Gloomy Forest |
| Muddy Loach | Beginner IV | Rare | Freshwater | Boulderwhite Mountains |
| Mudneck Clam | Advanced I | Normal | Unique Biome | Vanished Ruins |
| Mussel | Intermediate I | Normal | Saltwater | Silverstone Bridge • Resortville • New Goldus |
| Northern Snakehead | Advanced IV | Rare | Freshwater | Ant Tunnel Passage • Steamerbrook • Water Supply Center • Harrot Hill |
| Octopirate | Beginner I | Exceptional | Saltwater | Lith Harbor |
| Octopus | Advanced I | Rare | Saltwater | Precipice Fortress • Sand Dunes |
| Oily Jellyfish | Advanced III | Normal | Unique Biome | North Sidian Road |
| Oily Scallop | Advanced II | Normal | Unique Biome | Debloon Ranch |
| Oily Shrimp | Advanced IV | Normal | Unique Biome | Outlaw's Overlook • Inferno Tree • Stormy Hills |
| Pale Chub | Beginner I | Rare | Freshwater | Tria • Evansville |
| Panther Grouper | Intermediate III | Epic | Saltwater | Ellbo's Hollow |
| Peacock-Eye Stingray | Advanced II | Exceptional | Freshwater | Mirror Castle • Ellua Riverside • Ellosylva • Twilight Moon Castle • Forelle Town • Greenia Falls • Rose Castle • Ludibrium Crevasse |
| Pearl Oyster | Advanced IV | Rare | Saltwater | Frozencrest • Cave of Eternity • Queenstown • Crystalfrost Wall • Igloo Hill |
| Pineapple Fish | Beginner I | Normal | Saltwater | Harang Island |
| Piranha | Advanced I | Exceptional | Freshwater | Ellua Forest Path • Corona Lake • Forest of Lost Memories • Lava Springs • Godspring • Fungeeburg Stump • Ellin Ruins • Verdant Heights • Breezy Hills |
| Poison Big Eye | Intermediate III | Normal | Unique Biome | Chekarta Chemicals • Kabrium Basin |
| Poison Leaf Fish | Intermediate IV | Normal | Unique Biome | Occupied Fellowstone |
| Poison Mullet | Beginner IV | Normal | Unique Biome | Boulderwhite Mountains |
| Porcupinefish | Intermediate III | Rare | Saltwater | Ellbo's Hollow |
| Purple Rockfish | Master | Rare | Unique Biome | Coco Island • Obsidian Mount • Melta Dam • Gloomy Forest |
| Pyromander | Master | Exceptional | Unique Biome | Pyratalos |
| Red Big Eye | Advanced III | Normal | Saltwater | Raptor Dive Pass • Frostbunny Park • Muros Media Park • Highcliff Temple |
| Red Bitterling | Intermediate IV | Rare | Unique Biome | Paruvan Plateau • Hotottot River • Molten Hourglass • Windsong Ravine • Picardiv |
| Red Rockfish | Intermediate IV | Normal | Saltwater | Henesys Docks |
| Red Sailfin Sandfish | Beginner IV | Rare | Saltwater | Lavaworks |
| Red Seaweed | Advanced II | Normal | Unique Biome | Ellua Riverside • Savage Crossroads |
| Red Striped Marlin | Advanced II | Exceptional | Unique Biome | Ellua Riverside • Savage Crossroads |
| Red Thread-Sail Filefish | Advanced II | Rare | Unique Biome | Ellua Riverside • Savage Crossroads |
| Red-Hot Grouper | Advanced I | Rare | Unique Biome | Lava Springs • Torrava River |
| Ricefish | Beginner I | Normal | Freshwater | Tria • Evansville |
| Ridgeback Shark | Advanced III | Epic | Unique Biome | Fractured Canyon • Taliskar • Magma Research Station |
| River Salmon | Intermediate II | Normal | Freshwater | Mounthill • Fellowstone Construction |
| Rockfish | Advanced II | Normal | Saltwater | Tidepool Cliffs • Barbosa Beach • Rainbow Mountain • Cheliska Bay • Tortuga Seaside Cliffs • Serene Docks |
| Rot Lobster | Advanced IV | Rare | Unique Biome | MSL Robot Dev Center • Moldy Hollow • Demonspring • Sealed Forest • Calamitysnare • Victoria Liner • Wallowville • Black Forest • Piercing Wind Hills • Stormy Hills |
| Rusty Drum | Intermediate I | Normal | Unique Biome | Kerning City |
| Rusty Mussel | Advanced II | Normal | Unique Biome | Debloon Ranch |
| Saddle Butterflyfish | Intermediate II | Rare | Saltwater | Goldus Pharmaceuticals |
| Sailfin Sandfish | Intermediate I | Normal | Saltwater | Silverstone Bridge • Resortville • New Goldus |
| Salmon | Intermediate I | Normal | Freshwater | Nerman Forge • Logger's Hill • Henesys • Aner Park • Majore Lake Park • Blooming Farm • Flora Avenue • Oasis Town |
| Sardine | Beginner IV | Rare | Saltwater | Beachway 111 • Barrota Port |
| Saw-Edged Perch | Advanced III | Exceptional | Saltwater | Raptor Dive Pass • Frostbunny Park • Muros Media Park • Highcliff Temple |
| Scarlet Pearl Oyster | Advanced IV | Rare | Unique Biome | Lava Crest • Darkmist Path • Lavaluna Cave • Wailing Mine • Magma Trail • Magma Gorge • MSL Electronics Institute • Blazing Forest |
| Sea Cucumber | Advanced IV | Exceptional | Saltwater | Frozencrest • Cave of Eternity • Queenstown • Crystalfrost Wall • Igloo Hill |
| Sea Pineapple | Advanced III | Rare | Saltwater | Raptor Dive Pass • Frostbunny Park • Muros Media Park • Highcliff Temple |
| Sea Turtle | Advanced III | Epic | Saltwater | Raptor Dive Pass • Frostbunny Park • Muros Media Park • Highcliff Temple |
| Sea Urchin | Advanced II | Epic | Saltwater | Tidepool Cliffs • Barbosa Beach • Rainbow Mountain • Cheliska Bay • Tortuga Seaside Cliffs • Serene Docks |
| Seademon | Master | Rare | Unique Biome | Coco Island • Cozalita Graveyard • Pyratalos (Fire Dragon) |
| Seahorse | Advanced IV | Normal | Saltwater | Frozencrest • Cave of Eternity • Queenstown • Crystalfrost Wall • Igloo Hill |
| Seahorus | Advanced II | Epic | Unique Biome | Horus's Nest Dungeon (Final Area) |
| Seaseraph | Master | Epic | Unique Biome | Gloomy Forest |
| Seaweed | Beginner I | Rare | Saltwater | Lith Harbor • Alikar |
| Shortfin Mako Shark | Advanced II | Exceptional | Saltwater | Tidepool Cliffs • Barbosa Beach • Rainbow Mountain • Cheliska Bay • Tortuga Seaside Cliffs • Serene Docks |
| Shrubberpuff | Beginner II | Rare | Unique Biome | |
| Silver Perch | Advanced I | Normal | Saltwater | Precipice Fortress • Sand Dunes |
| Skipjack Tuna | Advanced II | Normal | Saltwater | Tidepool Cliffs • Barbosa Beach • Rainbow Mountain • Cheliska Bay • Tortuga Seaside Cliffs • Serene Docks |
| Slick Hermit Crab | Intermediate I | Normal | Unique Biome | Suffering Wasteland |
| Smoky Butterflyfish | Intermediate III | Rare | Unique Biome | Chekarta Chemicals • Kabrium Basin |
| Smooth Hammerhead | Beginner IV | Exceptional | Saltwater | Beachway 111 • Barrota Port |
| Sorrowfish | Intermediate II | Rare | Unique Biome | Development Lab (Goldus Pharmaceutical Sub-Map) |
| Speckled Axolotl | Advanced IV | Exceptional | Freshwater | Ant Tunnel Passage • Steamerbrook • Water Supply Center • Harrot Hill |
| Squid | Intermediate III | Rare | Saltwater | Ellbo's Hollow |
| Star Bream | Intermediate III | Exceptional | Freshwater | Ellinia • Decor Haven • Orne Town • Eileen Town • Trinket Woods • Ellin Town • Ellin Grove |
| Star Candy Crab | Beginner I | Rare | Saltwater | Harang Island |
| Starfish | Beginner III | Exceptional | Saltwater | Sylvan Woods Trail |
| Steam Ray | Advanced III | Normal | Unique Biome | Fractured Canyon • Taliskar • Magma Research Station |
| Stingray | Advanced II | Rare | Saltwater | Tidepool Cliffs • Barbosa Beach • Rainbow Mountain • Cheliska Bay • Tortuga Seaside Cliffs • Serene Docks |
| Striped Beakfish | Advanced II | Rare | Saltwater | Tidepool Cliffs • Barbosa Beach • Rainbow Mountain • Cheliska Bay • Tortuga Seaside Cliffs • Serene Docks |
| Striped Mantis Shrimp | Intermediate IV | Rare | Freshwater | Ant Tunnel Entrance • Forgotten Keep • Prism Falls • West Wind Hill • Razed Forest • West Watchtower • Picchu Picchu Gardens • Baum Tree • Serpent Town |
| Striped Marlin | Advanced I | Epic | Saltwater | Precipice Fortress • Sand Dunes |
| Sturgeon | Advanced II | Epic | Freshwater | Mirror Castle • Ellua Riverside • Ellosylva • Twilight Moon Castle • Forelle Town • Greenia Falls • Rose Castle • Ludibrium Crevasse |
| Sucker Perch | Beginner III | Normal | Unique Biome | Kerning Junkyard • Revoldic Dam |
| Sunny Butterflyfish | Intermediate IV | Rare | Saltwater | Henesys Docks |
| Thread-Sail Filefish | Intermediate IV | Normal | Saltwater | Henesys Docks |
| Tiger Blowfish | Advanced I | Rare | Saltwater | Precipice Fortress • Sand Dunes |
| Tiger Prawn | Beginner II | Exceptional | Saltwater | Victoria Runway sub-map (Tria) |
| Toasty Crab | Advanced I | Normal | Unique Biome | Lava Springs • Torrava River |
| Topmouth Gudgeon | Beginner IV | Normal | Freshwater | Boulderwhite Mountains |
| Toxic Flounder | Intermediate II | Normal | Unique Biome | Development Lab (Goldus Pharmaceutical Sub-Map) |
| Toxic Lobster | Master | Normal | Unique Biome | Gloomy Forest |
| Toxic Octopus | Advanced I | Rare | Unique Biome | Vanished Ruins |
| Treelacanth | Master | Exceptional | Freshwater | Ludible Time Hall |
| Triton's Trumpet | Intermediate I | Epic | Saltwater | Silverstone Bridge • Resortville • New Goldus |
| Vilequill | Master | Epic | Unique Biome | Temple of Immortals |
| Voldrake | Beginner II | Rare | Saltwater | |
| Whale Shark | Master | Exceptional | Saltwater | Coco Island |
| White Crucian Carp | Beginner III | Normal | Freshwater | Fairy Tree Lake • Revoldic Dam |
| Yesso Scallop | Intermediate III | Normal | Saltwater | Ellbo's Hollow |
| Zebra Bream | Intermediate IV | Exceptional | Freshwater | Ant Tunnel Entrance • Forgotten Keep • Prism Falls • West Wind Hill • Razed Forest • West Watchtower • Picchu Picchu Gardens • Baum Tree • Serpent Town |