Our Work

Shellfish Propagation

For centuries, the waters around Pamet Harbor have produced some of Cape Cod's finest shellfish. The cold, nutrient-rich tidal flow of the Pamet River creates ideal conditions for oysters, quahogs, and the clams we dig — and Friends of Pamet River is making the expansion of these populations our founding priority.

We will support the Truro Shellfish Department's propagation work — seeding expansion in Pamet Harbor and along Truro's beaches — and publish clear, public-facing resources so residents and visitors can harvest responsibly and safely.

• Co-funding oyster, quahog, and clam seeding in Pamet Harbor and Truro beaches
• Remediating invasive green crabs that prey on young shellfish
• Public education on permits, harvesting rules, and food safety
• Long-term goal: eelgrass restoration in Pamet Harbor

Fighting the Green Crab

The European green crab (Carcinus maenas) is one of the most destructive invasive species on the Atlantic coast. It arrived in the 1800s — likely in the ballast water and hull fouling of ships from Europe — and has spread up the coast ever since, thriving in exactly the warming, sheltered tidal waters of the Pamet.

Green crabs are voracious. A single crab can eat dozens of young clams and oysters a day, and they shred the roots of eelgrass and salt marsh as they dig — undermining the very habitat the Pamet's restoration depends on. Where they take hold, native shellfish and grasses collapse.

Friends of Pamet River will fund ideas to remediate this invader — from targeted trapping programs to research and emerging "green-crab-to-market" efforts that turn the problem into a harvest. Protecting our shellfish means controlling what's eating them.

Just up the shore, our neighbors are showing what's possible: in Wellfleet Harbor, a shellfisherman and the Center for Coastal Studies launched a 2025 pilot that traps green crabs at hotspots like Blackfish Creek and Chipman's Cove — with the catch composted rather than wasted. Read how Wellfleet is fighting back → It's exactly the kind of hands-on program we want to help bring to the Pamet.

The Purple Crab & Salt Marsh Dieback

Walk the edges of the Pamet's salt marsh and you may notice bare, collapsing banks where thick green cordgrass used to grow. Scientists call it salt marsh dieback, and here on the outer Cape one of the main culprits lives right underfoot: the purple marsh crab (Sesarma reticulatum).

These crabs graze on cordgrass at night — chewing it down to stubble and honeycombing the peat with their burrows. Cordgrass (Spartina) is the plant that holds the whole marsh together: its roots bind the soil, buffer storms, and build the habitat that fish, shellfish, and shorebirds depend on. When the grass dies, the bank crumbles, peat washes away, and the marsh sinks faster than sea-level rise alone would ever take it.

Purple crabs are native, but their numbers have exploded because their predators no longer reach them — striped bass, a normal predator of the purple crab, have been pushed downstream toward the harbor and the bay as tidal flow through the river has degraded. According to the Cape Cod National Seashore, this runaway grazing is the leading cause of marsh loss here — visible in aerial photos going back to the 1950s.

Here's the twist: research on Cape Cod has found that the invasive green crab, of all things, can actually help — by preying on purple crabs and scaring them off the cordgrass, letting the marsh begin to recover. It's a reminder that these problems are tangled together, and that smart, science-led management matters. Friends of Pamet River will fund monitoring, research, and marsh-protection efforts — from crab-exclusion caging to restoring the predators that keep the balance — to keep the Pamet's marsh alive.

Growing Truro Aquaculture

Alongside restoring wild beds, Truro is home to a small but growing community of shellfish farmers who raise oysters in the same clean, tidal waters that make the Pamet special. A working aquaculture industry means cleaner water, locally grown food, and a living waterfront — and Friends of Pamet River is expanding its mission to stand behind it.

Getting a farm off the ground is hard: seed is costly, gear adds up, and permitting takes patience. We want to lower those barriers — funding oyster seed, helping cover start-up costs, and partnering with the Town and its Shellfish Department to open and manage grant sites so more Truro growers can succeed.

• Funding oyster seed to stock and expand local aquaculture grants
• Helping licensed Truro growers with gear, seed, and start-up costs
• Partnering with the Town and Shellfish Department on new grant sites
• Keeping a working waterfront and locally grown shellfish in Truro's future