The rate of dead seal strandings in Maine is about three times the normal rate for the summer and is close to 60. Most of the seals that have been stranded this summer have been found dead, NOAA said. The dead seals have included gray seals and harbor seals.

More evidence of great white sharks this summer leads biologists to expect the species will become a more common sight here.

Temperatures are expected to remain above 80 degrees for the rest of the week.

The black substance was staining the feet of people at the beach, prompting one local resident to alert state officials.

However, numerous fishermen say the assessment of a decline in the stock doesn't match what they're seeing on the water, where haddock appear to them to be plentiful.

Powerful storm surges, coinciding with the monthly astronomical high tide, are flooding low-lying streets in Portland and other coastal communities.

New data show the population of baby lobsters off New England is below average, raising concerns about the size of future commercial hauls of the valuable crustaceans as waters warm.

A shark attacked a diver near the Chatham Islands, prompting emergency response from Hato Hone St John and the New Zealand Flying Doctors Service.

Testing has revealed black algae washing on Waiheke shores is toxic. “Currently the algal bloom on some Waiheke beaches could lead to skin or eye irritation if you are in contact with the water,” said Dr David Sinclair, Te Whatu Ora’s Northern Region medical officer of health.

Caulerpa brachypus, which can spread rapidly and create dense mats, was found in July in Blind Bay and Tryphena Harbour. This was the first time the pest species had been detected in New Zealand.

Sargassum, a type of marine algae, is washing up en masse on Caribbean beaches, closing them down to the public. The same sargassum is here in Miami, lining Miami beaches.

The sea lions vary in decomposition. Several had their bones exposed Monday afternoon.

The Hawke's Bay Regional Council is taking tests and awaiting results from a likely algal bloom spreading across the sea off the Hawke's Bay coast. Coastwatchers say the reddish-brown discolouration has been growing over several weeks – visitors to the Bluff Hill lookout reported what may have been its early signs on January 31, when it appeared to be coming from a ship apparently circling at sea off the Port of Napier.

Test results show the bloom was almost certainly to blame for mass deaths of kina as well as crayfish, starfish and sea cucumber which washed ashore at Hardinge Rd, including Sandy Beach, and on a small part of Westshore Beach eight days ago.

The carcass of a 41-foot adult female gray whale landed at San Francisco’s Crissy Field on March 31. A second adult female was found April 3 at Moss Beach in San Mateo County. A third was found April 7 floating near the Berkeley Marina and the following day another at Muir Beach. A video of the fifth dead whale was posted on social media Friday.

Marine heatwaves are growing longer, stronger and more frequent thanks to climate change.

Some tourists have canceled summer trips and lawmakers on Tobago have termed the sargassum invasion a “natural disaster.”

Algae blooms have infiltrated much of the Cape Coral canal system, creating a foul odor and a green, spray-paint tint to some of the water.

The beaches of Namibia have been filled with thousands of seal fetuses. The problem was first detected in August, when observers began to see an unusual number of abortions and prematurely killed pups on the beaches of Pelican Point. Current estimates indicate about 5,000 have died in Pelican Point alone, although the precise reasons are still unknown.