The hordes of fish were killed by a red tide, a large "bloom" of toxic algae that appears on Florida's Gulf Coast about once a year. Experts say the bloom shouldn't be happening right now.

The Southeast Alaska Tribal Ocean Research program found that all shellfish species in Settler's Cove and Seaport Beach in Ketchikan and Starrigavan North beach in Sitka are affected by high levels of Paralytic Shellfish Toxin, posing the risk of Paralytic Shellfish Poisoning for consumers.

Anyone visiting lakes or rivers in the region is being cautioned to look out for blue-green algae after the Blue Lake Rancheria confirmed levels of...

However, if ingested by oysters and other shellfish, the sudden burst of a ciliate form of zooplankton — or animal plankton — called Mesodinium rubrum could turn their meat pink.

Increasing blanket of mucus-like substance in water threatens coral and fishing industry

Nearly 30 years after an outbreak of AVM killed hundreds of eagles in Arkansas, scientists have traced the origins of the deadly disease to a previously unknown cyanobacterium.

On Feb. 16, the Sanibel-Captiva Conservation Foundation reported that many residents and visitors have called SCCF, the city of Sanibel and Clinic for the Rehabilitation of Wildlife with concerns about royal terns over the past few weeks and the sight of their carcasses on the Sanibel Causeway bridges. Test results on deceased royal terns confirmed on Feb. 15 that they had high levels of brevetoxins, the neurotoxin associated with red tide.

Pet fish dumped in local waterways have become the scourge of Hamilton’s marshes and harbour

A harmful algal bloom, better known as a red tide, has been building up at Elands Bay on the West Coast, about 220km north of Cape Town.

Investigations into the fish die-off and pinkish-purple colour of the Sentosa South Cove waterway earlier this month have found that they were caused by the heavy and persistent rainfall in recent weeks that altered water conditions.. Read more at straitstimes.com.

The discoveries on Mirror Lake and Lake George spark concerns about the number of nutrients entering the lakes.

The Central District Health Department as well as the Southwest District Health and Idaho Department of Environmental Quality says recent water samples indicate there were concentrations of toxin-producing cyanobacteria in the reservoir.

Residents note significant changes in the Christiansen Lake ecosystem since 2019. This includes fewer nesting birds, fish, and mammals around the lake, while the leech population has increased along with the occurrence of algal blooms.

Another day of dead marine life surfacing in Biscayne Bay as the swath of suffocated fish appears to be spreading.

Locals Saturday expressed resentment over the presence of a red algal bloom on Dal surface that has completely changed the lake’s colour into yellowish.

The image shows a bloom of phytoplankton in the Barents Sea, north of Scandinavia and Russia.The floating plant-like organisms are showing up in higher concentrations across the Arctic Ocean.

Seaweed native to the northwest Pacific is invading the rich marine waters of the Strait of Gibraltar and the brown algae is clogging up fishermen's nets and endangering their way of life.

Eutrophication — excess nutrients in water — and environmental changes were identified as the cause of the harmful algal blooms in the fresh aquatic system of the Achencoil.

Don't swim in these three lakes if you notice any of these features, authorities say.

"Lake Erie receives a lot of attention for its problems with HABS, but Ohio’s inland lakes and waterways share the increasingly dangerous problem and its impacts on health as a source of drinking water and recreation, and the potential loss of millions of dollars in tourism and lakeside property values."