State of Montana Website Montana State Parks Website
  Home » Fishing » Regulations » Koi or Goldfish Pond Registration Form
Koi or Goldfish Pond Registration Form

Koi and goldfish are controlled exotic fish species (see ARM 12.6.2203). They can be legally kept indoors in an aquarium or outdoors in ponds that meet the following criteria:

  • not larger than 400 sq. ft.
  • not within 100 year flood plain
  • 200 yards from open water
  • does not receive diverted surface water
  • does not discharge to surface water

Such ponds do not require stocking permits for koi or goldfish; however, they are required to be registered with Montana Fish, Wildlife and Parks. For stocking of other fish species in ponds please contact your local Fish, Wildlife and Parks office.

To register your koi or goldfish pond please answer the following questions and press submit.

For website related correspondence or technical questions, please use the Web staff contact page.

*Indicates required fields.

Registrant Information
First Name:*
Last Name:*
Street Address:*
City:*
State:*
Zip Code:*
E-mail *

Pond Information
Location of Pond (address and/or GPS coordinates):*
Please provide a written description of the location if coordinates are unknown.
(Note: This field is limited to 2000 characters.)
Check all of the boxes below that apply:
The pond contains Koi or Goldfish.
The pond surface area is less than 400 sq ft.
The pond is not within 200 yards from open water.
The pond does not receive diverted surface water.
The pond does not discharge to surface water.