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HomeFish and Game CodeDiv. 9Ch. 1§ 12023 Aquatic Nuisance Species Penalties

§ 12023 Aquatic Nuisance Species Penalties

Fish and Game Code·California
AI Summary·Official Text·Key Terms·Related Statutes·References
AI SummaryVerified

§ 12023 Aquatic Nuisance Species Penalties

This law says that if you break the rules about using harmful water species, you can go to jail, get a big fine, lose your licenses, and have to pay for any damage you cause.

Key Takeaways

  • •Using an aquatic nuisance species to break Section 6400 is a misdemeanor with 6‑12 months in jail, up to $50,000 fine, and loss of all related licenses.
  • •You must pay for any damage to private or public property, commercial or sport fisheries, and the communities that rely on them.
  • •If the harmful species escapes from your land onto someone else’s, you are still liable for the damage.
  • •The rule does not apply to normal ballast‑water releases or to plants you didn’t know you had.

Example

A fisherman puts invasive zebra mussels into a lake to catch more fish, and the mussels spread and hurt the local fishing business.

Because he used a harmful water species, the law says he could be sentenced to 6 months‑1 year in jail, fined up to $50,000, lose his fishing licenses, and be sued by the fishing companies for the money they lost.

AI-generated — May contain errors. Not legal advice. Always verify source.

Official Source
View on CA.gov

§ 12023 Aquatic Nuisance Species Penalties

(a) Notwithstanding Section 12002 and 12007, any person who violates Section 6400 through the use of an aquatic nuisance species, as defined in Section 6431, is guilty of a misdemeanor, punishable by all of the following: (1) Imprisonment in the county jail for not less than six months or more than one year, a fine of not more than fifty thousand dollars ($50,000) for each violation, or both that imprisonment and fine. (2) Revocation of all of the defendant’s licenses and permits issued pursuant to this code. (b) A person who personally or through another violates Section 6400, through the use of an aquatic nuisance species, is liable to the owner of any privately or publicly owned property for any damages to that property caused by the violation. A person who violates Section 6400 through the use of an aquatic nuisance species shall also be liable for all monetary damages directly, indirectly, and proximately caused thereby, including, but not limited to, damages to any commercial fishery, sport fishery, or to the public communities which depend upon those fisheries for a portion of their annual income. The Attorney General may file a civil action on behalf of the fisheries or communities that are damaged as a result of the violation. In addition, a private citizen who suffers damages as a result of the violation may file a civil action against the violator. (c) A person who allows an aquatic nuisance species to escape from their property to the property of another, whether privately or publicly owned, is liable to the owner of the intruded upon property for any damages caused by the species. (d) This section shall not apply to the placement of any live fish, any fresh or salt water animal, or any aquatic plant from the discharge or exchange of ballast water from any vessel as defined by Section 21 of the Harbors and Navigation Code. (e) This section does not apply to the placement of an aquatic plant by a person who was unaware that they were in possession of the plant. This exception includes circumstances in which a plant becomes unknowingly and temporarily attached or affixed to a boat, boat trailer, or boat motor. (Amended by Stats. 2023, Ch. 132, Sec. 220. (AB 1760) Effective January 1, 2024.)

Last verified: January 10, 2026

Key Terms

nuisanceimprisonmentviolationnavigationpossessiondamagesharborproperty

Related Statutes

  • § 12003.1 Overlimiting Wildlife Punishment
  • § 12003.2 Penalty For Unauthorized Taking
  • § 12005 Bear Part Sale Penalties
  • § 3961 Dog Threat To Wildlife
  • § 12157 Wildlife Crime Forfeiture Rules

References

  • Official text at leginfo.legislature.ca.gov
  • California Legislature. Fish and Game Code. Section 12023.
View Official Source