Officials in Tasmania are striving to determine a magenta ooze that has appeared on a isolated coast, with some scientists anxious it could be an algal bloom.
The pink-tinged sludge appeared along a stretch of Randalls Bay about 60km south of Hobart. A like substance has also been recorded on parts of Little Roaring Beach and Little Taylors Bay.
Specimens have been taken and provided to the Environment Protection Authority for examination. A spokesperson stated that "algal blooms are a natural occurrence in response to changes in nutrients, heat, precipitation or illumination".
"These blooms are sometimes called reddish tides because the blooms can color the water crimson," the representative noted. "Few algal blooms are dangerous, with many species acting as a major source of energy for marine life in the oceanic food chain."
"The primary reason of reddish water in local waters is the oceanic algae Noctiluca scintillans, which can cause bioluminescent light displays at night."
Algal blooms are natural events but their occurrence has increased in recent times, partly due to global warming and pollution that merge to create food-loaded oceans primed for the rapid spread of dinoflagellates.
Dinoflagellates are a phytoplankton species that usually serve as the ocean's detritus consumers. During a proliferation, there is a quick expansion in their numbers that interferes with the healthy balance of marine environments.
These events have been likened to subsurface wildfires and can keep expanding as long as the environment is suitable. In severe cases, delicate ocean habitats can be destroyed as sea creatures is eliminated or suffocated, supplying more food for the bloom.
A southern state not long ago grappled with a catastrophic algal bloom along its coastal region after a series of marine heatwaves, which expanded across a vast area. The event resulted in surfers with eye irritation and hacking coughs and may have caused the death of up to 250,000 marine animals across numerous types, according to government calculations.
An estuarine ecologist, who helped investigate the start of the previous algal bloom commented, based on images of the current situation, the most likely species involved was Noctiluca scintillans, a kind of dinoflagellate also known as "sea sparkle".
"There have been lots of these outbreaks around Tassie of late," she said.
The scientist said this organism did not produce poisons comparable to the organism involved in that severe algal bloom, but it does eat small invertebrates and "many fish eggs", meaning marine life were in greatest danger.
"You usually see a bloom of sea sparkle after a bloom of something else, or for example a salmon or coral spawning event," she said.
A campaigner, who took samples of the pink sludge in the state, stated it appeared the potential proliferation had "expanded greatly" and indicated the aquaculture sector was the primary suspect, pointing to comparable events in other places.
"So Tasmania needs to deliver a firm alert here, the government and the EPA need to respond to this. We need to study the samples we've taken and we need to notify the people here," she emphasized.
The scientist stated she had worries for community health after feeling a prickling feeling along her arms and face while being sprayed with tainted seawater.
An conservation group has reported dead octopus and dead sea cucumbers washing ashore, with a longtime environmental campaigner labeling the circumstances as an "environmental emergency" and urging the state premier to inspect and "assume command the response that authorities must be undertaking".
"The leader needs to realize this is a disaster in the making, financially as well as environmentally."
Addressing reporters, the official said he was not aware of any relationships between the event and the farming business, stating scientific testing was required before conclusions could be drawn.
"We must make certain our aquatic environments are safe for nature and sustainable," he said.
"Our coastal assets across the state are our treasures and we need to guarantee the people and our industry can coexist to use our aquatic resources efficiently and in a lasting way."
A passionate writer and productivity coach dedicated to helping others achieve their goals through mindful practices.