Me. Rev. Stat. tit. 12, § 6543

A person who purchases or sells herring in their live or raw state for packing, other than by a standard unit of measure or by a fractional part of a standard unit of measure, commits a civil violation for which a forfeiture of not less than $100 and not more than $500 may be adjudged. The standard units of measure are the bushel, barrel of 3 bushels or the hogshead of 17 1/2 bushels.