Rainbow trout

The rainbow trout is an uncommon fish that appears at different times of the year. From March to June, it can be found between 4am to 9am and 4pm to 9pm, but can be found again in Autumn from September to November, between 4am to 9pm. It sells for 800 Bells at Tom Nook's store. In Animal Crossing: City Folk, the description in the 'Bugs and Fish' window says, "Males of this species turn a vibrant rainbow color during the breeding period." Once donated to the Museum, it can be found in the middle-left tank in the aquarium.

Further Information
The rainbow fish or Oncorhynchus mykiss is a member of the Salmon family native to tributaries of the Pacific Ocean in Asia and North America. Rainbow trout vary in color - lake varieties light and silvery while river variants are vibrant and colorful. It is a type of sport fish, which means a fish that has been introtuced to countries simply to be caught for the purpose of sport. Popular bait used for rainbow-trout fishing is salmon eggs, which causes confusion because they are related. Introducing this fish to parts of South America has caused problems for native fish, by either being eaten, outsported or catching disease, which has given them the label of pest by fisheries. Rainbow trout have a varied diet, mainly eating insects but can eat smaller fish starting from when they are born.