In the state of Maine there are specific laws in place to make sure all traps are equipped with escape vents that have certain dimensions. These vents are there to allow young lobsters and other creatures to come in, eat, and leave as they please. The are made so

American lobster (Homarus americanus)  trying to escape trap  through vents for juveniles. Chebeague Island, Casco Bay, Maine  ,  Animal,Wildlife,Crustacean,Decapod,Clawed lobster,Northern lobster,American,Animalia,Animal,Wildlife,Crustracea,Crustacean,Malacostraca,Decapoda,Decapod,Nephropidae,Clawed lobster,Homarus,Homarus americanus,Northern lobster,North America,USA,Eastern USA,New England,Maine,Boat,Environment,Fishing Industry,Fishing Industries,Temperate,Arthropod,Arthropods,Fisheries,Fishery,Fishing,Invertebrate,American,United States of America,Sustainable,Sustainablility,Sustainable fishing,Marine  ,  Jeff Rotman
This is an image of a lobster trying to leave through an escape vent.

What happens if a lobster trap becomes detached and is lost in the ocean? For a while this became an issue because animals could get stuck in these traps with no way out. In order to combat the effects of escaped traps biodegradable steel rings became part of every trap. These rings disintegrate in 6 to 12 months. Once these rings disintegrate the vents made for smaller creatures to crawl out of fully come off so bigger animals can escape from the traps.

These practices and regulations have been put in place to help preserve the industry and to not over- exploit this natural resource.

To see specific guidelines and measurements for escape vents click here.