Saving Seafood

New Study Reveals Dusky Sharks Preying On Seals For First Time Off Nantucket

August 29, 2025 — A new study confirms what scientists have known for years: dusky sharks are eating seals off the coast of Nantucket.

There are few known predators of seals in the Atlantic Ocean, but scientists can add one more to the list after a team of researchers captured what is believed to be the first aerial video showing a dusky shark killing and eating a grey seal near Nantucket.

“It’s one of the most exciting things I’ve been involved with as a shark scientist because it really changes the way we see this species,” said Megan Winton, a senior scientist at the Atlantic White Shark Conservancy and the lead author of the study.

Two years ago, in July of 2023, boaters and beachgoers took photos and videos of sharks preying on seals off Great Point, and scientists later confirmed that the sharks in question were dusky sharks, not white sharks, as initially thought. This was notable because, until then, there was no evidence that dusky sharks ate seals.

One study from South Africa had found a seal in the stomach of a dusky shark, but at the time, scientists thought it was the result of a scavenging event, rather than part of the shark’s usual diet.

Read the full article at the Nantucket Current

Cape Cod Warned of Shark Boom

June 26, 2017 — A great white shark population boom is underway off Cape Cod, with as many as 150 expected in local waters this summer — and first responders are training to keep an eye out for the massive predators and deal with their traumatic bites.

“They have multiplied in numbers exponentially since I became chief,” said Orleans fire Chief Anthony Pike, who has led Orleans Fire and Rescue for the past three years. “Great white sharks comprise about 30 percent of my daily work right now, and I never, ever thought that would be a thing.”

Massachusetts Marine Fisheries scientist Gregory Skomal and others began studying the regional population of white sharks in 2014, when they counted 68 great whites. Last summer, that number was 147.

Skomal says 40 percent of the 141 sharks his research team tracked in 2015 returned to Cape waters in 2016. According to the Atlantic Shark Conservancy, there have already been eight confirmed great white sightings this month. Great whites typically patrol to the cool ocean waters off Chatham and other Cape towns between July and October, and Skomal — who has been with Marine Fisheries for 30 years — said the number of shark sightings has jumped over the past decade.

“For my first 20 years we never talked about sharks,” Skomal said.

Great whites travel to the Cape to prey on the area’s large population of gray seals. The last fatal shark attack in Massachusetts was in 1937, and if one of the animals does bite a human, Skomal said it’s most likely a case of “mistaken identity.”

“You know, biting the person thinking that it might be a normal prey item like a seal. Typically, the shark won’t eat the person,” Skomal said. “As a result, though, white sharks have very big jaws and sharp teeth, and cause traumatic injuries, and those kinds of traumatic injuries could lead to fatality.”

Read the full story at the Boston Herald

Grey seal population booming in New England

June 16, 2017 — Grey seals are making a comeback, not only in Connecticut, but throughout New England.

Hunted for more than a century the population was dangerously low.  The Marine Mammal Protection Act went into effect in 1972, and thus began a reversal in the numbers.

“That provided them federal government protections from harassment, killing them as well,” said Janelle Schuh, Stranding Coordinator at Mystic Aquarium.

Now scientists are saying the population is booming. They estimate there are anywhere from 30,000 to 50,000 grey seals in New England.

“In 2015 NOAA did a recent stock assessment where basically they g out to the pupping areas where grey seals are giving birth and kind of look at what the population is doing and what the status is and they are definitely seeing increases,” said Schuh.

Exactly why the number has grown so much remains to be seen but Shuh says they’re staying because the location is ideal.

“Seals are quote unquote smart individuals. They’re gonna go where the fish are. They’re opportunistic feeders so they’re gonna swim around in the ocean if they find a large supply of fish they’re gonna hang out and they’re gonna have fish that they have in that area,” said Schuh.

Read the full story WTNH