marine biology
A massive algal bloom has devastated marine life in South Australia over the past eight months, killing around one million animals across more than 550 species. Researchers have identified the culprit as Karenia cristata, a species producing a newly discovered toxin that could spread worldwide. The event, one of the most destructive on record, raises concerns about emerging threats to global oceans.
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Video footage has captured orcas in the Gulf of California targeting young great white sharks, flipping them to access their livers. Researchers documented this behavior on two occasions, suggesting a specialized shark-hunting group of orcas. The tactic induces temporary paralysis in the sharks, allowing the orcas to feed efficiently.