A toxic algae outbreak off the coast of South Australia has killed over 200 species of marine life. The algae, which started growing in March, now covers more than 4,500 square kilometers.
Deadly Algal Bloom
The algae releases toxins that suffocate marine animals, causing widespread death. Fish, rays, and sharks have been affected. Dr. Vanessa Pirotta, a wildlife scientist, says this is an unprecedented event because the algae continues to spread.
Brad Martin from OzFish, a non-profit conservation group, explains that while algal blooms are not new, their unusually large size is having a devastating impact. The toxins damage gills and tissues, and the high algae density reduces oxygen levels in the water, making it hard for fish to breathe. This has been described as a “horror movie for fish.”
Impact on Marine Life
People have been sending pictures of dead marine animals washing up on shore, including a 3-meter white shark. Crabs and pufferfish, which live near coral reefs and can’t move quickly, have been particularly affected.
While the algae isn’t dangerous to humans, touching it can cause skin irritation and breathing problems. The South Australian government has advised people to avoid swimming in areas with discolored water or foam.
Causes and Consequences
The outbreak is linked to hot weather and high sea temperatures, which have been 2.5 degrees Celsius above average since last September. This has also affected commercial fishing and tourism, with some areas closed due to the algae.
Researchers and government agencies are monitoring the situation, as the algae continues to move westward. The last major algal bloom in South Australia occurred in 2014.
Source: BBC