Officials in the island state are attempting to pinpoint a pink slime that has surfaced on a remote shoreline, with certain experts concerned it could be an algae outbreak.
The pink-tinged sludge appeared along a section of a southern bay about 60km south of the city. A similar sludge has also been recorded on parts of Little Roaring Beach and Little Taylors Bay.
Samples have been gathered and provided to the Environment Protection Authority for analysis. A official remarked that "phytoplankton proliferations are a natural occurrence in response to shifts in minerals, heat, rainfall or sunlight".
"The events are at times called crimson or rosy tides because the blooms can color the water reddish," the official added. "Only some algal blooms are toxic, with many species acting as a primary source of energy for marine life in the oceanic food chain."
"The usual source of reddish water in Tasmanian waters is the oceanic algae Noctiluca scintillans, which can create glowing light shows at night."
Algae outbreaks occur naturally but their frequency has increased in recent times, partly due to environmental shifts and contamination that combine to create food-loaded oceans primed for the rapid spread of dinoflagellates.
Dinoflagellates are a phytoplankton species that usually function as the ocean's garbage cleaners. During a outbreak, there is a rapid growth in their numbers that disturbs the healthy balance of ecosystems.
These phenomena have been equated with subsurface wildfires and can keep expanding as long as conditions are ripe. In severe cases, sensitive marine ecosystems can be devastated as sea creatures is killed or smothered, offering more food for the bloom.
South Australia in the past confronted a severe algae outbreak along its southern shore after a succession of sea temperature spikes, which spread across an extensive zone. The outbreak resulted in beachgoers with eye irritation and severe coughing and may have killed up to 250,000 marine animals across hundreds of species, according to government calculations.
A marine expert, who helped investigate the beginning of that event said, based on photos of the local event, the most likely species involved was Noctiluca scintillans, a kind of dinoflagellate also known as "marine shimmer".
"There have been numerous of these blooms around the island of late," she remarked.
Coleman explained sea sparkle did not generate toxins similar to the type involved in that severe outbreak, but it does eat tiny creatures and "numerous fish eggs", meaning aquatic creatures were in greatest danger.
"It's common to observe a outbreak of this algae after a bloom of something else, or something like a fish reproduction," she noted.
A campaigner, who collected samples of the pink sludge in the state, commented it seemed the possible outbreak had "grown significantly" and indicated the salmon farming industry was the primary suspect, citing similar cases elsewhere.
"Therefore we needs to deliver a strong warning here, the authorities and the regulators need to respond to this. We need to study the samples we've gathered and we need to notify the public here," she said.
The scientist said she had anxieties for public safety after feeling a numbness along her arms and face while being exposed with contaminated seawater.
An conservation group has documented lifeless animals and dead sea cucumbers appearing on the coast, with a prominent conservationist labeling the circumstances as an "natural disaster" and demanding the government head to see and "take control the response that officials must be doing".
"The leader needs to realize this is a crisis in the happening, financially as well as for nature."
Addressing journalists, the premier stated he was not aware of any relationships between the algal bloom and the salmon industry, emphasizing laboratory analysis was necessary before conclusions could be reached.
"We need to ensure our aquatic environments are ecologically sound and long-lasting," he said.
"Our coastal assets across Tasmania are our resources and we need to ensure the people and our industry can live together to use our aquatic resources efficiently and responsibly."
Elias Vance is a Canadian journalist and political analyst with over a decade of experience covering national affairs and policy developments.