First Annual Nantucket Green Crab Derby with the Nantucket Maria Mitchell Association

Kelly Bernatzky • July 20, 2021

As part of the Second Annual Nantucket Green Crab Week, the Nantucket Maria Mitchell Association (MMA) hosted the first ever Nantucket Green Crab Derby on July 16. Nantucket Green Crab Week is a collaboration between the MMA and Nantucket Land Council (NLC), offering a full week of daily activities to learn about and take action against invasive European green crabs on Nantucket.

 

European green crabs were first introduced to North America in the 1800s, likely traveling in ballast water of merchant ships from Europe. This invasive species is now abundant on Nantucket, threatening crucial aquatic resources, including eelgrass beds, shellfish populations, and native crab communities here on the island.

 

Together with thirteen active teams and forty-nine participants, the Nantucket Green Crab Derby collected over 650 individual green crabs weighing approximately thirty-one pounds. Considering females can release up to 185,000 larvae per season, the Derby may have prevented up to 60 million larval baby green crabs from entering Nantucket’s waters this year!

 

The grand prize winning team, “Crabby Middle Schooler,” collected 7.4 lbs. of green crabs. The second place team, “Nana Claws,” was very close with 6.2 lbs. and the highest number of individual crabs, totaling 232. The largest crab prize went to “The Green Crab Hunters” who collected an enormous 5.0 oz. green crab. “The Bronner 4” took home the prize for Best Decorated Crab with their crab named “Tamatoa” featuring a jingle shell and barnacles. “Crabby Middle Schooler” received an honorable mention for their well-decorated crab, “Shelley,” featuring a well-placed jingle shell! Both “Tamatoa” and “Shelley” will be on display at the Maria Mitchell Aquarium.

 

Though Nantucket Green Crab Week is over, anyone is welcome to join the MMA’s Citizen Science project on Green Crabs by helping conduct Green Crab Surveys. The more submissions the MMA receives, the better we can target green crabs where they are most abundant, track their movement preferences, and see how they use Nantucket’s sensitive eelgrass beds. To participate and learn more about this invasive species, please visit the Maria Mitchell Association Green Crab Research webpage at https://www.mariamitchell.org/the-green-crab

 

The Maria Mitchell Association is a private non-profit organization. Founded in 1902, the MMA works to preserve the legacy of Nantucket native astronomer, naturalist, librarian, and educator, Maria Mitchell. The Maria Mitchell Association operates two observatories, a natural science museum, an aquarium, a research center, and preserves the historic birthplace of Maria Mitchell. A wide variety of science and history-related programming is offered throughout the year for people of all ages.

 

Nantucket Land Council is a 501(c)3 environmental advocacy organization – protecting and preserving open space, harbor, pond, and groundwater, and advocating for the environment at Select Board, Planning Board, and Conservation Commission meetings. The Nantucket Land Council also hosts the State of the Harbor Forum each year and Oysterfest each November to educate residents on the state of our water resources, and what we can all do to help maintain this critical resource. For more information on the Nantucket Land Council’s environmental work and initiatives, please visit https://www.nantucketlandcouncil.org. 

For Immediate Release

July 20 2021

Contact: Kelly Bernatzky, Development Associate

kbernatzky@mariamitchell.org

Recent Posts

August 3, 2026
“If you don’t look, you don’t see. You have to go and look.” -Edith Andrews
July 28, 2026
NANTUCKET, MA— Join the Nantucket Maria Mitchell Association (MMA), Nantucket Land and Water Council (NLC), and Sustainable Nantucket (SN) for the Seventh Annual Nantucket Green Crab Week! The MMA, NLC, and SN will be offering fun daily events from Monday, August 3 to Saturday, August 8 to learn about, and take action against, invasive European green crabs on Nantucket. European green crabs were first introduced to North America in the 1800s, likely traveling in the ballast water of merchant ships from Europe. This invasive species is now abundant on Nantucket, threatening crucial aquatic resources, including eelgrass beds, shellfish populations, and native crab communities. Together, as a community, it is possible to help prevent green crabs from destroying the natural resources that make Nantucket’s waters so special! Please come join us during Nantucket Green Crab Week to learn more. MMA Green Crab Identification Workshop and Derby Information Session Registration Link: Maria Mitchell Association Monday, August 3, 3:45 PM – 4:30 PM Price: FREE Location: MMA Aquarium, 32 Washington Street Join MMA Aquarium staff to learn how to identify the European green crab (Carcinus maenus), an invasive species that threatens Nantucket's native species and habitats! We will compare these species to local crab species and determine their biological sex. This is a great chance to learn about our annual Nantucket Green Crab Derby and all its events! MMA Nantucket Green Crab Survey: Seine Method Registration Link: Maria Mitchell Association Tuesday, August 4, 3:15 PM – 4:15 PM Price: FREE Location: Hither Creek Beach Access (Beach Access #52) Join MMA Aquarium staff on a survey for invasive European green crabs! This survey will be a part of the MMA Nantucket Green Crab Community Science Survey that you can do yourself at any time. In this session, we will be using a seine net. Annual Green Crab Fertilizer and Bait Pickup Registration Link: Maria Mitchell Association Thursday, August 6, 10:00 AM – 12:00 PM Price: FREE Location: Sustainable Nantucket's Community Farm, 168 Hummock Pond Rd In collaboration with the Sustainable Nantucket, please join us for this free, fun, and exciting way to help control the population of the invasive green crab, all while creating an environmentally friendly fertilizer for your garden. For folks to make their own green crab fertilizer, they should bring completely waterproof boots they're comfortable crushing dead crabs with, as well as a sealable bottle or jar to take home their fertilizer. We will provide crabs, coolers, vinegar, and take-home fertilizer instructions. Nantucket Green Crab Survey: Wading and Hand Net Registration Link: Maria Mitchell Association Friday, August 7, 5:00 PM – 6:00 PM Price: FREE Location: The Creeks/Harbor Flats, 99 Washington Street Ext Join MMA Aquarium staff on a survey for invasive European green crabs! This survey will be a part of the MMA Nantucket Green Crab Community Science Survey that you can do yourself at any time! In this session, we will be wading and using hand nets. Annual Green Crab Derby Registration Link: Maria Mitchell Association Saturday, August 8, 12:00 AM – 4:00 PM Price: $10, Groups of Up To 4 Persons Can Compete Help the Maria Mitchell Association and the Nantucket Land Council fight the green crab invasion by participating in the annual Nantucket Green Crab Derby! Participate in a team of up to 4 to help us maintain healthy marine habitats and for a chance to win prizes! Rules and prize details are detailed in the reservation process. Green crabs can be caught between 12am – 4pm and dropped off at the Maria Mitchell Association Aquarium between 12pm – 4pm! Sustainable Nantucket is a nonprofit organization dedicated to strengthening Nantucket’s local food system and building a more sustainable island community. Through education, advocacy, and community programs, the organization supports local farmers and producers, increases access to locally grown food, and connects the community with Nantucket’s agricultural resources. The Nantucket Land & Water Council is a nonprofit organization dedicated to protecting Nantucket’s land, water, and natural resources. Through conservation, research, education, and advocacy, the organization works to preserve open spaces, protect water quality, and ensure the long-term environmental health of Nantucket for future generations. The Maria Mitchell Association was founded in 1902 to preserve the legacy of Nantucket native astronomer, naturalist, librarian, and educator, Maria Mitchell. After she discovered a comet in 1847, Mitchell’s international fame led to many achievements and awards, including an appointment as the first professor of astronomy at Vassar College. Maria Mitchell believed in “learning by doing” and today that philosophy is reflected in the MMA’s mission statement, programs, research projects, and other activities. The Maria Mitchell Association operates two observatories, a natural science museum, an aquarium, a research center, and preserves the historic birthplace of Maria Mitchell. A wide variety of science and history-related programming is offered throughout the year for people of all ages. ####
By Jascin N. Leonardo Finger July 27, 2026
August 1, 2026 marks Maria Mitchell’s 208 th Birthday! To celebrate, join us for an open house the day before on July 31, 2026 from 3-5PM . Since just about the founding of the Maria Mitchell Association – way back in 1902 – the MMA has hosted some celebration or marked the occasion of our namesake’s birth. From 3-5PM, Vestal Street will be close to traffic and our Vestal Street properties will be open free to the public. We will have activities, games, art projects, live music with Susan Berman and Ray Saunders, and refreshments will be served. So, stop by and say hello! JNLF
Show More