<div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>A diver has shared shocking before-and-after photos that reveal the ecological devastation caused by an ongoing </span><a href="https://www.9news.com.au/national/south-australia-algal-bloom-more-could-emerge-over-coming-years-as-authorities-seek-global-help/b2e3d341-6b04-468e-bcfe-0d94f28bbfe5" rel="" target="" title="algal bloom"><span>algal bloom</span></a><span> in South Australian waters.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Mark Tozer, a diver of 38 years' experience, said he was left "stunned" and "heartbroken" yesterday after going diving at the site of a shipwreck, which lies some 12km off the coast of Adelaide's Glenelg Beach.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Tozer, who founded the Rodney Fox and Mark Tozer's Museum and Research Centre, told 9news.com.au he had visited the shipwreck many times before, but this was the first time since a toxic algal bloom began affecting waters off parts of the state's coast last March.</span></div></div><div><div id="adspot-mobile-medium"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE:</span></strong><span> </span><a href="https://www.9news.com.au/world/texas-floods-search-for-missing-girls-plows-forward-after-flash-flood-kills-at-least-people-in-texas/9da0f633-51b1-46f9-8b04-2e0c8ba86c6f" rel="" target="" title="Texas flood death toll hits 70 as 21 children found dead"><strong><span>Texas flood death toll hits 70 as 21 children found dead</span></strong></a></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"While I was aware of the ongoing algal bloom, I had no idea of the true extent of the damage until I saw it for myself."</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>In an emotional post on Facebook, Tozer said he was still struggling to process what he saw.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"'Chernobyl' is the word that keeps echoing in my mind," he wrote.</span></div></div><div><div class="OUTBRAIN" data-reactroot="" data-src="//www.9news.com.au/national/like-diving-through-a-graveyard-shock-shipwreck-photos-reveal-algae-bloom-devastation/d1ce1648-cf90-4da0-a4bc-7dff809dd1dd" data-widget-id="AR_5"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"A wreck that's normally teeming with life was stripped bare.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"No fish. No colour. Just silence. It felt like diving through a graveyard."</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The post included colourful and vibrant photos Tozer had taken just 12 months earlier at the same spot.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Tozer said the visibility at the site had been reduced to less than a few metres and dead molluscs were scattered across the sea floor.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"This is not just a beach issue," he said.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"This environmental event is stretching far out into the ocean, affecting ecosystems that many assume are untouched.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"I strongly believe the public needs to be made aware that this crisis is not confined to the shorelines—it's spreading deep into our marine environment."</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The  Karenia mikimotoi species of algae was first detected on the Fleurieu Peninsula in mid-March.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Metres of foam and dead fish began washing up in a stretch across Waitpinga and Parsons beaches.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Since then, foaming seas and fish kills have been seen along the Fleurieu Peninsula, Kangaroo Island and Yorke Peninsula.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Most recently, low levels of the algae have been found in West Lakes, and testing is being done in the Port River.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Karenia mikimotoi is not toxic to humans, but exposure to discoloured or foamy water can cause short-term skin or eye irritation and respiratory symptoms, including coughing or shortness of breath. </span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Back in March, more than 100 surfers reported becoming sick with cold and allergy-like symptoms.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The algae can be devastating to marine life and affect fish gills and skin.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Fish, sharks, rays, and a wide range of invertebrates have all been impacted by the ongoing bloom.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>According to the SA Department of Environment, there is nothing that can be done to dilute or dissipate the bloom naturally, and similar blooms around the world have lasted from weeks to several months.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The bloom, believed to have been caused by an ongoing marine heatwave and calm conditions, has started to clear somewhat thanks to cooler winter temperatures.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>But Department of Environment Director of Strategic Projects Grant Pelton </span><a href="https://www.9news.com.au/national/south-australia-algal-bloom-more-could-emerge-over-coming-years-as-authorities-seek-global-help/b2e3d341-6b04-468e-bcfe-0d94f28bbfe5" rel="" target="" title="told 9news.com.au late last month"><span>told 9news.com.au late last month</span></a><span> the Karenia mikimotoi were just lying dormant until warmer temperatures return in summer.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"What this species does is that when conditions are less favourable, it changes its mode of reproduction, and it ends up producing cysts, which sink to the sea floor, and they float around, and they wait, basically, in simple terms, until the conditions are better again," he said.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>"When there's more light, more water, warm water, the appropriate salinity level, and enough nutrients, then they'll start reproducing again."</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The algal bloom has </span><a href="https://www.9news.com.au/national/toxic-algae-bloom-south-australia-calls-natural-disaster-declaration-seafood-industry/07536ff4-1fba-404d-a6fc-aaef88299593" rel="" target="" title="hit the the local seafood industry hard"><span>hit the the local seafood industry hard</span></a><span>, with fishers reporting declining sales, fuelled by consumer concerns over contamination.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Rod Ness, a commercial fisherman in Victor Harbor for three decades, said last week sales at his fresh fish shop had dropped 70 per cent in the last three weeks.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The slump has prompted calls for the algal bloom to be declared a national disaster by the federal government.</span></div></div>