Pop-eyed goldfish

The Pop-Eyed Goldfish (デメキン, Demekin), known as the Popeyed Goldfish prior to, is a rare tiny-shadowed fish in the found in the river in all games prior to , where it is now a pond fish. It sells for 1,300 Bells and appears all year from 9 AM to 4 PM. The player's catch quotes in and  reference the cartoon Popeye, where spinach is a source of strength for the titular character.

In
In, the Pop-Eyed Goldfish is a lucky item, meaning it gives a 777-point Happy Home Academy bonus when placed in the player's house.

In
When a Popeyed Goldfish is donated, Blathers will say this:

In
When a Popeyed Goldfish is donated, Blathers will say this:

In
When accepting the fish for the museum, Blathers will say this:

In
An information board in the aquarium will display this description of the Pop-Eyed Goldfish upon donation:

In
Once donated to the museum the Pop-Eyed Goldfish can be found in the first exhibit room in the small tank with the Ranchu Goldfish and Guppy.

Real-world information
The Carassius auratus shares its scientific name with all types of Goldfish. The Popeyed Goldfish, or Black Moor Goldfish, is a harmless fish that lives in slow-flowing ponds, ditches, rivers, and lakes. It is a specially bred type of carp with large, protruding eyes, which, to some people's surprise, has poor eyesight as a result of its heavy inbreeding. It is related to other types of telescope fish, Carp and is indirectly related to the Koi. It feeds off of small insects, crustaceans, and plants. In China, it is called the dragon-eye. They are good for people who are just starting their freshwater tank.