Sharing Seal Space by the Seashore

Introduction to the Greater Atlantic Marine Mammal Stranding Network

Harbor and gray seals hauled out on a beach in Chatham, Massachusetts.

Why Are Seals Important?

Seals play an important role in marine ecosystems as both predators and prey. However, seals are sometimes viewed negatively due to widespread belief that they compete with fishermen for fish and attract sharks. Many beachgoers along the North Atlantic coast of the United States are surprised to see seals on the beach. Before learning how we can support local seal populations in the North Atlantic region, let's clear up some common myths about seals!

Aerial view of a large group of seals hauled out on the beach.
Aerial view of a large group of seals hauled out on the beach.
A harbor with fishing vessels lined up along the dock.
A harbor with fishing vessels lined up along the dock.
A great white shark swimming in the ocean.
A great white shark swimming in the ocean.

Responding to Sick Seals

The Marine Mammal Health and Stranding Response Program

A seal being released on the beach after being successfully rehabilitated. A group of people watch from behind a line of yellow tape.
A seal being released on the beach after being successfully rehabilitated. A group of people watch from behind a line of yellow tape.

Seal released after being successfully rehabilitated by the Stranding Response Network. Photo: Ainsley Smith, NOAA

The national Marine Mammal Health and Stranding Response Program coordinates emergency responses to sick, injured, distressed, or dead marine mammals and sea turtles. The marine mammals include seals, sea lions, dolphins, porpoises, and whales. NOAA Fisheries is the lead agency that coordinates the program’s efforts, which involve a variety of partner organizations, including:

  • State and federal wildlife and fisheries agencies
  • Veterinary clinics
  • Non-profit agencies
  • Academic institutions

Organizations that respond to stranded marine mammals hold special permits authorized by NOAA. All marine mammals are federally protected under the Marine Mammal Protection Act.

A dead minke whale being towed to shore with a rope. The rocky Maine coastline can be seen in the background, with a skyline of coniferous trees.

A dead minke whale being towed to shore. The Stranding Response Network responds to reports of dead, injured, and distressed marine mammals. Photo: Allied Whale.

What is a seal stranding and how do you report it?

A young harbor seal returns to the water with a satellite tag attached to its back.

Harbor seal returning to the wild after being tagged with a radio transmitter. Photo credit: NOAA/NMFS/NEFSC/PSB.

A stranded animal is one that is dead, one that is unable to return to the water, is unable to move within the water, or needs medical attention. A seal on the beach may be sick or injured and require medical attention, but it could also be healthy and simply resting. It is normal for seals to rest on beaches or rocky coastal areas. Mother seals sometimes leave their pups unattended on the beach for a period of time while they return to sea to hunt. If you see a seal that is entangled, appears sick, is injured, or if you are unsure, please report it to the stranding network at (866) 755-6622.


I Found a Seal! Now What?

If you visit beaches in the North Atlantic, you may encounter a seal. What should you do if you find one? Keep in mind that all marine mammals are federally protected and only organizations that are authorized by NOAA may handle them (such as Stranding Network Response partner organizations).

After learning how to behave around seals, be an ambassador and share what you've learned with friends and family members too!

Proper Seal Etiquette

Close-up of harbor seal face.
A juvenile harp seal on the snow in Maine.
A group of gray seals in the water with their heads above the surface.

Practice proper behavior around seals and educate your friends and family members about seal etiquette. Remember: stay back, don't touch, keep dogs on a leash, and don't disturb the animal. Observe the seal's behavior from a safe distance. If you are not sure whether an animal is in distress, do not approach it but do report it.

If you see a dead, injured or distressed whale, seal, dolphin, porpoise, or sea turtle, please call the NOAA Fisheries 24-hour stranding hotline: (866) 755-6622.


Meet the Stranding Network

The region of the Atlantic coast from Maine to Virginia is served by the  Greater Atlantic Marine Mammal Stranding Network . There are 13 organizations along the North Atlantic coast that respond to seal stranding reports. These organizations collaborate with one another and NOAA to recover, rehabilitate, and release sick and injured seals along the coast. The Stranding Network also responds to stranded whales, dolphins and sea turtles. Scroll through the following map to meet the Stranding Network partner organizations! Use the plus (+) and minus (-) symbols in the lower right corner to zoom in and out. Some organizations in the Stranding Network have their own hotlines for reporting stranded marine wildlife, but the 24-hour NOAA stranding hotline can be used to report stranded animals anywhere along the North Atlantic coast at (866) 755-6622. If you know which Stranding Network organization responds to reports in your area, visit their website and save their hotline number in your cell phone. The following map shows each Stranding Network partner organization that responds directly to stranded seal reports or provides rehabilitation. Get to know the organizations in your area!


Success Stories

On April 24, 2020, a local beach walker found an entangled gray seal hauled out at Camp Hero State Park in Montauk, New York and immediately called the New York State Stranding Hotline. A team of New York Marine Rescue Center (NYMRC) biologists responded to the call immediately to rescue the distressed seal. Carbonara, a female, yearling, gray seal was entangled with twine around her neck. Carbonara was rushed back to the NYMRC hospital facility for a complete physical and removal of the entanglement. 

Carbonara was left with severe lacerations around her neck from the entanglement. Blood work collected during the admit physical indicated leukocytosis and antibiotics were administered immediately. In addition, topical treatment was provided to Carbonara to help prevent further infection. 

Carbonara received care at the NYMRC hospital for 8 weeks before she was cleared for release by the senior veterinarian. Carbonara was fitted with a blue plastic identification tag on the right hind flipper with the numbers: 90. These tags allow for post-release identification if the animal is re-sighted or strands again. On June 22, 2020 Carbonara was released back into the ocean at Tiana Beach in Hampton Bays, New York!

A juvenile gray seal with a laceration on its neck from a gillnet entanglement.

Carbonara, a young gray seal, was found on the beach with severe lacerations from a gillnet entanglement. Photo: New York Marine Rescue.

The gray seal that was found entangled in a gillnet being released on the beach following its recovery.

Carbonara was released back into the wild following her recovery. Photo: New York Marine Rescue.

Next meet Nubble, a juvenile male hooded seal who was stranded on Hampton Beach in New Hampshire on February 11, 2020. Nubble was rescued by the Seacoast Science Center, where he stayed overnight. The following day, on February 12, Nubble was transported to the National Marine Life Center (NMLC) for rehabilitation. His symptoms included dehydration, lethargy, and a cut on the rear left flipper. He also had sand in his gut and involuntary eye spasms. At NMLC, Nubble was treated for parasites and given hydration therapy. He was released on Scusset Beach State Reservation in Sandwich, Massachusetts on March 2, 2020 following a successful recovery.

A juvenile hooded seal being released on the beach after successful rehabilitation.

Nubble's release back into the wild. Photo: Ainsley Smith, NOAA


Watch for Seals!

Where can you expect to find seals along the North Atlantic coast? Explore the following maps and check out gray seal pupping sites and seal stranding locations. Which species can be found in your area? Do you live near a stranding hotspot? Watch for seals in your area. Practice proper seal etiquette by keeping your dog leashed on the beach, staying 150 feet away, and saving NOAA stranding hotline number in your phone.

Explore the following maps by using the slider to move between data sets. Click on the icon in the lower left corner to view the map legend. Move the map by holding down your left mouse clicker and dragging the mouse. Zoom in and out by using the + and − symbols on the lower right corner. Click on individual data points to learn more about the stranding event.

Gray Seal Pupping Sites (left) and Seal Stranding Report Locations from 2009-2019 (right). Scroll between the two maps to explore gray seal pupping sites and stranding reports of harbor seals, harp seals, hooded seals, and gray seals. The map on the left shows known gray seal pupping locations along the Northeast Atlantic coast. The pups are born between December and February. During the summer, they can be found in the company of harbor seals. The map on the right shows stranding reports of four species from 2009-2019. Each color represents a different species. Click the circle on the lower left corner of the map to view the legend. Seal stranding location data credit: NOAA Fisheries. Gray seal pupping location data credits: den Heyer et al. 2020 and Wood et al. 2020.

Heat Maps of Seal Stranding Reports from 2009-2019. Scroll between the two maps to explore seal stranding hotspots. The map on the left shows a heatmap visualization of stranding densities, while the map on the right shows the number of stranding reports per hexagonal spatial units. Click on a hexagon to see the number of seal strandings reported to the Stranding Network between 2009-2019. Keep in mind that these maps show stranding reports and not seal distributions in general. Click the circle on the lower left corner of the map to view the legend.

A gray seal pup on the pavement in a parking lot in Acadian National Park.

Gray seal pup in Acadia National Park. Photo: Allied Whale.

One final reminder...

If you see a dead, injured or distressed whale, seal, dolphin, porpoise, or sea turtle please call the NOAA Fisheries 24-hour stranding hotline: (866) 755-6622. Save the number in your cell phone!

All photographs and data presented in this Story Map were obtained under the appropriate NOAA Marine Mammal Protection Act Scientific Research Permit or Stranding Agreement.

Please do your part to protect seals and their habitat.

Here are some ways you can help protect North Atlantic seal populations!

  1. Next time you are at the beach, pick up some trash!
  2. Don't get too close to seals. Watch them from a safe distance of 150 feet.
  3. Keep your dog on a leash at the beach.
  4. Take the Share the Shore Pledge!
An image of a seal with text that reads "take the Share The Shore pledge. 1. I will keep my distance and keep pets away from seals. 2. I will not take selfies with wildlife. 3. I will share this information with at least three people.

Take the Share the Shore Pledge to help support the seals!

Thank you to the Stranding Network Partners who contributed to the development of this story map and for their work responding to stranded marine wildlife! If you would like to support their work, please consider volunteering or donating to their organizations. Visit their websites to learn how.

Michelle Boone

VSFS Intern

Kate Swails

Communication and Education Specialist

Talya tenBrink

GIS Specialist

Ainsley Smith

Regional Marine Mammal Stranding Coordinator

Allison Rosner

Marine Mammal Management Specialist

Seal stranding location data

NOAA Fisheries

Gray seal pupping site data

Wood, S. A., Murray, K. T., Josephson, E., & Gilbert, J. (2020). Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988–2019. Journal of mammalogy101(1), 121-128.

den Heyer, C. E., Bowen, W. D., Dale, J., Gosselin, J. F., Hammill, M. O., Johnston, D. W., Lang, S. L. C., Murray, K. T., Stenson, G. B., & Wood, S. A. Contrasting trends in gray seal (Halichoerus grypus) pup production throughout the increasing northwest Atlantic metapopulation. Marine Mammal Science. 2020: 1-20.  https://doi.org/10.1111/mms.12773 

Seal released after being successfully rehabilitated by the Stranding Response Network. Photo: Ainsley Smith, NOAA

A dead minke whale being towed to shore. The Stranding Response Network responds to reports of dead, injured, and distressed marine mammals. Photo: Allied Whale.

Harbor seal returning to the wild after being tagged with a radio transmitter. Photo credit: NOAA/NMFS/NEFSC/PSB.

Carbonara, a young gray seal, was found on the beach with severe lacerations from a gillnet entanglement. Photo: New York Marine Rescue.

Carbonara was released back into the wild following her recovery. Photo: New York Marine Rescue.

Nubble's release back into the wild. Photo: Ainsley Smith, NOAA

Gray seal pup in Acadia National Park. Photo: Allied Whale.

Take the Share the Shore Pledge to help support the seals!