This is a list of all items which can be placed into a Fish Tank. This page does not include the prices of fishes.
Regular Fish
These fish are commonly caught fish which are usually caught using either Wiggly Worm, Shiny Flashy Thing, Salmon Eggs, Fishing Fly, Shrimp Lure or Whizmo Gizmo.
| Fish | Max Size |
|---|---|
 Goldfish
| 15lb |
 Catfish
| 30lb |
 Dogfish
| 50lb |
 Bass
| 70lb |
 Gar
| 90lb |
 Mahi Mahi
| 120lb |
 Sunfish
| 160lb |
 Stonefish
| 160lb |
 Sand Shark
| 200lb |
 Whale
| 200lb |
 Dragon Turtle
| 200lb |
Crabs
Crabs are caught using Lobster Traps. Using five of any bait and waiting anywhere between 1-3 days will yield a crab. Depending on the bait used and location placed, it may yield different sized crabs.
| Crab | Max Size |
|---|---|
 Dungeonist Crab
| ? |
 Lobster
| ? |
 Crawdad
| ? |
 Alaskan King Crab
| ? |
 Purple Shore Crab
| ? |
 Hermit Crab
| ? |
Radioactive/Ice Fishes
These fish can only be caught in special environments. Ice environments are created by using a Hand Drill on an Ice Crust Block with a Water Bucket on top, while radioactive environments are created by using a Nuclear Detonator on a Uranium Block with a Water Bucket on top. Only Uranium Glowing Lure can be used to catch fish in radioactive environments while only Mega-Pellet Bait can be used to catch fish in ice environments.
| Fish | Environment | Max Size |
|---|---|---|
 Maidmare Fish
| Radioactive | 160lb |
 Weird Manta Ray
| Radioactive | 190lb |
 Double-Headed Angel-Devil Fish
| Radioactive | 60lb |
 Alpha Great White Shark
| Ice | 190lb |
 Absolutely Real Elephant Fish
| Ice | 60lb |
 Cuttlefish
| Ice | 120lb |
Halloween Fish
Halloween fish can only be caught using either Minor Otherworldly Bait, Lesser Otherworldly Bait or Otherworldly Bait.
| Fish | Max Size |
|---|---|
 Ghost Fish
| 200lb |
 Skeletal Shark
| 200lb |
 Demon Angler
| 200lb |
WinterFest Fish
WinterFest fish can only be caught using Candy Cane Bait.
| Fish | Max Size |
|---|---|
 Swedish Fish
| 180lb |
 Gingerbread Fish
| 150lb |
 Neon Squid
| 200lb |
 Antarctic Icefish
| 120lb |
 Mr. Narwhal
| 200lb |
 Glass Piglet Squid
| 50lb |
COTD Fish
COTD fish are caught during their respective events using Catch-of-the-Day Bait. All fish caught using a Catch-of-the-Day Bait have a max perfect size of 150lb, but the extra effect of the bait may catch even bigger fish, causing it to be labeled "Massive". The maximum massive fish size is ~190lb.
| Fish | Max Size | Recipe |
|---|---|---|
 Pineapple Fish
| 150lb | Catch it during the Super Pineapple Party. |
 Firefin
| 150lb | Catch it during SummerFest. |
 Orca
| 150lb | Appears on random days of the week. |
 Mutant Fish
| 150lb | Catch it during Night Of The Comet. |
 Rainbowfish
| 150lb | Catch it during St. Patrick's Week. |
 Totally Legit Bunnyfish
| 150lb | Catch it during Easter Week. |
 Picasso Triggerfish
| 150lb | Appears on random days of the week. |
 Axolotl
| 150lb | Catch it during Cinco De Mayo Week |
 Seahorse
| 150lb | Catch it during Anniversary Week |
 Koi Fish
| 150lb | Catch it during Harvest Festival. |
Trivia
- Fishing with a Catch-of-the-Day Bait may result in the player getting a fish bigger than its maximum perfect size.
- Such fish are called massive fish.
- A bug involving the Shrimp Lure made players able to catch any kind of fish with a greatly higher size than perfect during the first hours after the fishing update was released. This bug was later fixed.
