Rainbowfish

The Rainbowfish is a fish introduced in. It can be found in rivers from May to October (in the Northern Hemisphere) between 9 AM to 4 PM, and it sells for 800 Bells.

Donating to the museum
As with all fish in, the Rainbowfish can be donated to the island's museum by talking to Blathers, the curator. He will say the following when given a Rainbowfish:

In
Once donated to the museum, the Rainbowfish can be found in the small fish tank in the entrance room with the Betta and Nibble Fish.