Cuttlefish numbers alarm scientists as Whyalla's marine ecosystem faces mysterious collapse

Marine scientists and local observers on South Australia's heritage-listed Cuttlefish Coast are sounding the alarm over a sharp drop in cuttlefish numbers, according to The Guardian. Divers have reported seeing only 'a couple of dozen' of the cephalopods in areas where they traditionally gather in their thousands, a collapse in populations that has begun since a massive algal bloom swept through the region.

The Whyalla region's cuttlefish phenomenon is a significant natural and cultural asset for the area and draws tourists and researchers from around the world. The creatures' annual aggregation is a unique marine event, and their sudden absence raises questions about water quality, food availability and broader ecosystem health in the gulf waters off South Australia's industrial heartland.

The die-off coincides with broader concerns about harmful algal blooms affecting the South Australian coast. Scientists and the local community now face urgent questions about what triggered the bloom and whether the cuttlefish will return, with implications for marine tourism, fisheries and the region's environmental future.

Sources: theguardian.com.

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