What are the ANS classifications?

There are three different classifications of ANS in North Dakota that range from prohibited (Class I) to listed (Class III). See the ANS list for classifications by species.

Prohibited (Class I) – ANS that are highly invasive but are limited or nonexistent in North Dakota. It is illegal to possess these species alive or dead. Example includes zebra mussels. Anglers should immediately return these to the water in which they were caught.

Regulated (Class II) – ANS that are established in North Dakota, may have limited commercial use, and management options are difficult or nonexistent. Permits are required to import or utilize these species, and generally only research permits are granted. Example includes curlyleaf pondweed. Anglers should return these to the water in which they were caught.

Listed (Class III) – ANS that are established in North Dakota, may be widespread, or have viable management options. Permits are required to import and rear these species for commercial use. Examples include common carp and silver carp. Anglers may keep these fish, but transport rules for game fish apply and it is recommended that you immediately kill these species upon catching.