How to Measure a Lobster
Massachusetts Saltwater Fishing
Lobsters must be measured with a special gauge to make sure that they are keepers. Carapace length is measured from the rear of the eye socket to the rear of the carapace on a line parallel to the center line of the body shell. Make sure the gauge is at the extreme rear of the eye socket below the rostrum or horn. A common error is to measure from the horn located forward of the eye socket, which results in an improper measurement.
All lobsters measuring less than the minimum legal carapace length, or larger than the maximum legal carapace length, must be immediately returned to the waters from which taken.
All lobsters must be measured immediately.
It shall be unlawful to possess any lobster, or part thereof, which is mutilated in a manner which makes accurate measurement impossible.