NASA<\/a> satellite imagery captured Kavachi erupting again, showing the volcano sending lava, ash, sulphur and acidic water into the surrounding sea. The eruption followed earlier documented events in 2007 and 2014. It remains unknown whether the sharks and other animals seen in the crater survived these eruptions. <\/p>\nReturning with robots<\/p>\n
Because of the danger posed by Kavachi\u2019s eruptions, follow-up research relied on robotic equipment rather than human divers. Phillips later returned to the site with Alistair Grinham of the University of Queensland and Matthew Dunbabin of Queensland University of Technology, using low-cost robotic systems designed to withstand \u2014 and be sacrificed to \u2014 extreme conditions. Dunbabin explained the challenge of studying such an environment: \u201cNo matter how well-built your systems are or how much they cost, it is very unlikely they will survive an explosion.\u201d The robots, small enough to fit into carry-on luggage, were treated as expendable. Sensors recorded surface pH drops, water temperatures up to ten degrees higher than normal, and confirmed that Kavachi is a strong greenhouse gas emitter. \u201cOne unexpected result was the eruption forced fresh material from the vent to be embedded into the robot itself,\u201d Dunbabin said. \u201cThis means we have a unique way of collecting physical rock samples.\u201d <\/p>\n
Why sharks can survive, for now <\/p>\n
Phillips acknowledged that, based on known biology, Kavachi should not support animal life beyond microorganisms. \u201cThere are a number of reasons why there shouldn\u2019t be anything living in there except maybe bacteria,\u201d he said. \u201cIt\u2019s very hot and acidic. It\u2019s very turbid. None of these things are good for fish.\u201d Yet the sharks were observed \u201cdarting in and out between the clouds of the plume\u201d during periods between eruptions. Whether the animals possess behavioural adaptations, heightened sensitivity to volcanic activity, or physiological tolerance to extreme conditions remains unresolved. <\/p>\n
Sharks Discovered Inside Underwater Volcano (EXCLUSIVE VIDEO) | Expedition Raw<\/p>\n
Experts have suggested that studying these sharks could help scientists better understand how marine species respond to extreme environmental stress, including rising ocean temperatures globally. Some researchers have proposed that the sharks may have developed unique physiological adaptations that allow them to tolerate Kavachi\u2019s hot, acidic conditions over time, though no definitive conclusions have yet been reached scientifically. As Phillips put it: \u201cThat\u2019s a lingering question mark.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"Scientists record large marine predators thriving inside an active underwater volcano thought hostile to complex life\/ Image: National…\n","protected":false},"author":3,"featured_media":455114,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[208529,208531,159,208532,208530,95682,67,132,68],"class_list":{"0":"post-455113","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-kavachi-volcano","9":"tag-marine-life-survival","10":"tag-science","11":"tag-sharkcano","12":"tag-sharks-in-volcano","13":"tag-underwater-volcano","14":"tag-united-states","15":"tag-unitedstates","16":"tag-us"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@us\/115739540046904573","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/455113","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/comments?post=455113"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/455113\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media\/455114"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media?parent=455113"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/categories?post=455113"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/tags?post=455113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"Scientists](\"https:\/\/www.europesays.com\/us\/wp-content\/uploads\/2025\/12\/sharks-in-volcanoes.jpg\" "\\"Scientists")
Scientists record large marine predators thriving inside an active underwater volcano thought hostile to complex life\/ Image: National Geographic Youtube In 2015, a scientific expedition to one of the most volatile underwater volcanoes on Earth produced a finding few researchers expected to see on their monitors: sharks swimming calmly inside the crater. The discovery was made at Kavachi, a submarine volcano located near the Solomon Islands in the southwest Pacific Ocean. Known for frequent eruptions that eject lava, ash and highly acidic water, Kavachi is widely regarded as an environment where complex marine life should not be able to survive. Yet footage captured during the expedition showed hammerhead sharks, silky sharks and a stingray moving through the volcano\u2019s interior, apparently unaffected by conditions considered hostile to most fish. <\/p>\n![\"volcano](\"https:\/\/www.europesays.com\/us\/wp-content\/uploads\/2025\/12\/volcano-stingray.jpg\" "\\"A")
<\/p>\n![\"sharks\"](\"https:\/\/www.europesays.com\/us\/wp-content\/uploads\/2025\/12\/sharks.jpg\" "\\"Hammerhead")
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