From Nookipedia, the Animal Crossing wiki
The Dace (ウグイ, Ugui) is a common brown fish that can be found swimming in rivers. It is worth 200 bells.
Donating to the museum
In Animal Crossing
Upon the dace's donation, Blathers will give a generic comment about it.
"This is one of those fish that seem to mysteriously disappear from time to time. Drives fishermen batty, wot! Have no fear, dear friend! You're leaving this beauty in very good wings, hmmm? Hoo! Owl humor. Hoo hoo!"
In Wild World
"I can't say I've ever seen this on a menu... To be honest, I can see why! It's rather bony...and one must consider the stench... No, none too appetizing."
In City Folk
"Most fishermen think of dace as a bit of a nuisance because they interfere with catching more desired fish. This fish cares not... During spawning season, the dace dons a bright orange stripe across its belly! Even nuisance fish get the urge to dress up and strut a bit, eh wot?"
In New Leaf
"Dace can live in cloudier, murkier water than most but are easy to see as their numbers are so plentiful. They are related to carp, and some species of Dace live in the ocean as well as rivers and streams. During mating season, the bellies of the males develop an orange stripe to indicate their intent to mate."
The Dace is a species of ray-finned fish in the Cyprinidae family. It is found in Mexico and the United States. They usually live in fast moving streams. They are found on the Vulnerable list in the Endangered Species warning.
Names in other languages