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What Is Lobster Fishing?

Lobster fishing is the harvesting of lobsters from the ocean, primarily using baited traps. It’s a multibillion-dollar global industry, a way of life for thousands of coastal families, and — particularly in Maine — something close to a cultural religion.

The American lobster fishery alone was worth about $725 million at the dock in 2021 (the most recent peak year), with Maine accounting for roughly 80% of that haul. Factor in processing, distribution, and restaurant sales, and the economic impact multiplies several times over.

But behind the butter-dipping and lobster rolls, there’s a demanding, dangerous, and increasingly uncertain profession.

How Lobster Trapping Works

The basic method hasn’t changed much in 150 years. A wire-mesh trap (historically wooden) is baited — herring and menhaden are the most common baits — and lowered to the ocean floor. A line runs from the trap to a painted buoy on the surface, identifying who owns it.

Lobsters are attracted by the bait scent, enter through a cone-shaped opening called a “head,” eat, and then can’t find the exit. When the fisherman returns (typically every 2-5 days), they haul the trap, measure each lobster, keep the legal ones, and return undersized or protected lobsters to the water.

In Maine, a typical lobsterman sets 800 traps (the legal maximum), spread across their fishing territory. That’s 800 traps to bait, set, haul, and maintain — every few days, year-round in many areas, though the peak season runs from late June through December.

The work starts early. Very early. Most lobster boats leave the dock between 4:00 and 5:00 AM. A full day involves hauling 200-400 traps, re-baiting each one, measuring and banding keepers, and returning to port to sell the catch. It’s physically exhausting — hauling waterlogged traps weighing 40-50 pounds each, hundreds of times per day.

Rules and Regulations

Lobster fishing is one of the most tightly regulated fisheries in the world — and for good reason. Without strict management, lobster populations can collapse, as they did in parts of southern New England.

The key regulations include:

Minimum size. In Maine, a lobster’s carapace (the body shell) must measure at least 3.25 inches from the eye socket to the start of the tail. Below that, it goes back. This ensures lobsters have a chance to reproduce before being harvested.

Maximum size. Unusually, there’s also a maximum — lobsters with carapaces over 5 inches must be returned. These large, old lobsters are prolific breeders, and protecting them helps sustain the population.

V-notch program. When a lobsterman catches an egg-bearing female, they cut a small V-shaped notch in her tail flipper before releasing her. Any lobster with a V-notch (even after the eggs are gone) must be released by all fishermen. This effectively gives breeding females permanent protection.

Trap limits. Maine limits each license holder to 800 traps. This prevents an arms race of ever-increasing trap numbers.

Licensing. Getting a commercial lobster license in Maine is notoriously difficult. There’s a waiting list, and most licenses pass within families. The apprenticeship program requires at least two years of working under a licensed lobsterman before you can even get on the waiting list.

The Territories

Here’s something most outsiders don’t know: lobster fishing grounds in Maine are divided into informal territories controlled by local fishing communities. These aren’t legally defined — they’re customary, enforced by social pressure and, occasionally, by less diplomatic means.

If you set traps in someone else’s territory without permission, you might find your trap lines cut, your buoys missing, or your traps mysteriously moved. In extreme cases, it can escalate further. These territorial systems are actually quite effective at preventing overfishing, since each community has a direct stake in managing its local lobster population.

Anthropologist James Acheson’s research on Maine’s lobster territories is a classic study in how informal property rights can manage common resources — sometimes more effectively than formal regulations.

Climate Change and the Fishery

The Gulf of Maine is warming faster than 99% of the world’s oceans. Water temperatures have risen about 3°F since the 1980s, and the pace is accelerating. This warming has complicated effects on lobsters.

In the short term, warmer water has actually boosted Maine’s lobster catch. Lobsters grow faster in warmer water, and the warming trend has expanded suitable habitat in northern areas. Maine’s annual harvest roughly tripled between 2005 and 2016.

But the long-term outlook is more concerning. In southern New England (Connecticut, Rhode Island, southern Massachusetts), warming waters have already devastated lobster populations — catches have dropped by over 90% since the late 1990s. Scientists worry that Maine is on a similar trajectory, just on a delayed timeline.

Warming also affects lobster shell disease, predator distributions, and the availability of the plankton that larval lobsters feed on. The fishery that has sustained Maine’s coast for generations faces genuine uncertainty.

Beyond Maine

Lobster fishing isn’t just an American thing. Major lobster fisheries exist in:

• Canada — particularly Nova Scotia, New Brunswick, and Prince Edward Island, which collectively rival Maine in production
• Australia — western rock lobster is one of the country’s most valuable fisheries
• South Africa — the West Coast rock lobster fishery
• Caribbean — spiny lobster (a different species from the American lobster)
• Europe — European lobster (Homarus gammarus), found from Norway to the Mediterranean

Each region has its own species, methods, regulations, and cultural traditions around lobster fishing.

A Way of Life

For many Maine fishing families, lobstering isn’t a job — it’s an identity. Families have fished the same waters for five or six generations. Kids start learning on their parents’ boats as young as 8 or 10. The rhythms of the fishery — the early mornings, the seasonal cycles, the community bonds — shape entire lives.

Whether that way of life can survive warming oceans, regulatory pressures, and economic change is one of the most pressing questions facing coastal New England. The lobsters are still there. The question is for how long.

Frequently Asked Questions

How are lobsters caught?

Most lobsters are caught using baited traps (also called pots). A wire or wooden trap is baited with fish (usually herring or menhaden), dropped to the ocean floor, and connected to a buoy on the surface by a line. The lobster enters the trap to eat the bait but can't easily find its way back out. Traps are hauled, checked, and re-baited regularly — usually every few days.

Why is Maine lobster so famous?

Maine produces about 80% of the U.S. lobster harvest. The cold, rocky waters of the Gulf of Maine provide ideal habitat for American lobsters. Maine's lobster industry is also culturally iconic — it has been a defining part of the state's economy and identity for over 150 years, with multi-generational fishing families and strict community-based territory systems.

Is lobster fishing sustainable?

Maine's American lobster fishery is generally considered well-managed, with strict size limits, egg-bearing female protections, and trap limits. However, warming ocean temperatures are shifting lobster populations northward, and the fishery faces long-term uncertainty from climate change. Overfishing has depleted lobster populations in southern New England.

Further Reading

• NOAA Fisheries: American Lobster
• Maine Department of Marine Resources
• Gulf of Maine Research Institute