These are characters as fish.
Disney
Mascots
Disney Flims/TV Shows
Pinocchio- Pacific Bluefin Tuna
Timon- Dragon Moray and Pumbaa- Stonefish
Agent Pleakley- Scorpionfish and Jumba Jookiba- Stonefish
Denahi- Scolloped Hammerhead
Denahi- Whitetip Reef Shark
Abby Mallard- Giant Guitarfish
Stanley Griff- Ocellaris Clownfish
Stanley/Dennis- Comet Goldfish
Stanley Griff- Great White Shark
Stanley Griff- Regal Tang
The Muppets Studio, LLC
Kermit the Frog- Mudskipper
Pixar
Buzz Lightyear as Giant Trevally
Mike Wazowski- Sandbar Shark
James P. Sullivan- Sand Tiger Shark
Bob Parr- Atlantic Sailfish
Helen Parr- Atlantic Blue Marlin
Violet Parr- Striped Marlin
Dash Parr- Pacific Bluefin Tuna
Jack-Jack Parr- Yellowfin Tuna
Marvel
Bruce Wayne- Striped Beakfish
Paramount/Viacom International
Nickelodeon
Eliza Thornberry- Regal Tang (Dory)
Darwin- Ocellaris Clownfish (Marlin)
Donnie Thornberry- Yellow Tang (Bubbles)
Debbie Thornberry- Moorish Idol (Gill)
Marianne Thornberry- Royal Gramma (Gurgle)
Nigel Thornberry- Great White Shark (Bruce)
SpongeBob SquarePants- Blobfish
SpongeBob SquarePants- Yellow Tang
Sandy Cheeks- Comet Goldfish
SpongeBob SquarePants- Ocellaris Clownfish
Libby Light Sprite- Regal Tang
Comedy Cantral
Butters Stotch as Green Moray
Warner Bros.
Cartoon Network
Blossom, Bubbles and Buttercup- Pennant Coarlfish, Regal Tang and Ocellaris Clownfish
Grizz- Long-Spined Porcupine Fish, Panda- Regal Tang and Ice Bear- Great White Shark
Mac Foster- Comet Goldfish
Mac Foster- Ocellaris Clownfish
Frankie Foster- Moorish Idol
Goo Foster- Common Seahorse
Miss Keane- Humphead Wrasse
DIC Entertainment/Cookie Jar
Sabrina Spellman- Sturgeon
Hanna-Barbera
Tom Cat- Humpback Anglerfish
PBS Kids
Mama Mirabelle- Black-Tip Reefshark
STX Entertainment
Uglydog- Blacktip Reef Shark
HIT Entertainment
Carlos's goldfish named Super, Dee, and Duper
Hasbro
Twilight Sparkle- Koi, Rainbow Dash- Catfish, Pinkie Pie- Guppy, Rarity- Siamese Fighting Fish, Applejack- Royal Dottyback, and Fluttershy- Pufferfish
20th Century Fox/Studios
Cretacous- Great Barracuda and Maelstorm- Humpback Anglerfish
Tiago, Carla and Bia- Pink Salmon Fry
Sony Pictures Relasing
Sony Pictures Amimation
Chuck- Bluecheek Butterflyfish
Columbia Pictures
Tri-Star
Lem- Australian Ghostshark
Universal
Flims/TV Shows
Illumination
Dreamworks
Studios Ghibli
Nightwalker- Ocean Sunfish
The Jim Henson Company
Stinky the Skunk- Skunkfish
Terrence McBird as Common Seahorse
Others
Sun (Trulli Tales)- Common Goldfish
Crossover