--- title: "Geography Cone Snail (Conus geographus) | AnimalTracks.wiki" description: "Reef hunter whose venom insulin, released into the water, appears to disorient schools of small fish before the snail engulfs them and harpoons them with a hollow venom tooth." image: "https://animaltracks.wiki/images/animals/geography-cone-snail-1.webp" published: "2026-09-06" updated: "2026-09-27" --- # Geography Cone Snail (*Conus geographus*) > **Status**: Checked against 6 sources, listed under Sources below. > **Tagline**: Reef hunter whose venom insulin, released into the water, appears to disorient schools of small fish before the snail engulfs them and harpoons them with a hollow venom tooth. > **Soundtrack Vibe**: French Dark Electro & EBM // Carpenter Brut, "Roller Mobster" > **Soundtrack Links**: [Spotify](https://open.spotify.com/track/7oxnK2wg8qFv8EXyyxKDJ4) | [YouTube](https://www.youtube.com/watch?v=qFfybn_W8Ak) > **Vibe Match**: Lethal high-octane synth velocity for a snail that fires a hollow radular tooth like a harpoon, injecting venom that incapacitates the fish it hunts. ## Biological Superpowers & Stats - **Taxonomy**: *Conus geographus* - **Danger Level**: Deadly - **Conservation Status**: Least Concern ([IUCN Red List](https://doi.org/10.2305/iucn.uk.2026-1.rlts.t192772a251030063.en)) - **Superpower**: Venom insulin that appears to be part of the "nirvana cabal," a toxin mix released into the water to disorient schools of small fish, which the snail then engulfs and harpoons with a hollow radular tooth. - **Habitat**: Living or broken coral reefs and sandy tidal zones across the tropical and subtropical Indo-Pacific, recorded from 0 to 200 meters deep - **Diet**: Small and medium fish that fit in its mouth, stung with venom and swallowed whole - **Tags**: mollusc, ocean, carnivore, venomous, nocturnal, predator ## Natural History & Behavior ## A Pretty Shell With a Harpoon Inside The **Geography Cone Snail** (*Conus geographus*) wears a smooth shell with small bumps at the shoulder, mottled brown or red over white, cream or rose pink. It measures 70 to 150 millimeters and weighs between 13.3 and 62 grams, with an average of 38.8 grams. It lives on living or broken coral reefs and in sandy tidal zones across the tropical and subtropical Indo-Pacific, including the northern shores of Australia. It is found mostly just below the tideline, with a recorded depth range of 0 to 200 meters. By day it lies buried in the sand; at night it hunts. > **The Nirvana Cabal** *Conus geographus* is believed to prey on fish hiding in reef crevices at night. Its venom insulin appears to be part of a toxin mix researchers call the nirvana cabal, released into the water to disorient schools of small fish. ## Fishing With a Sugar Crash Researchers found specialized insulins as major components in the venoms of two fish-hunting cone snails, *Conus geographus* and the tulip cone (*Conus tulipa*). Injected into fish, the venom insulin causes hypoglycemic shock, a dangerous drop in blood sugar. Its discoverers say their evidence suggests it is "specifically used as a weapon for prey capture" by cone snails that hunt with a net strategy: disoriented fish are easier to engulf with the snail's distended false mouth, which works like a net. It also uses the hook-and-line method: it slowly approaches its prey, waving its proboscis like a lure to attract the fish before stinging it with its radula. The fish jerks violently for a few moments and is hit with a paralyzing venom that stiffens it, and the snail swallows its catch whole, regurgitating the bones hours or days later. Either way, the venom goes in through a hollow radular tooth used as a harpoon. Gene-sequencing work on its venom duct found that the most highly expressed toxin is not paralytic: it "causes sensory disorientation." The team's data suggest that disorienting prey is central to how the snail uses its venom. ## The Deadliest Shell on the Reef The same team calls *Conus geographus* "the deadliest snail on earth," the cone snail behind most of the human fatalities recorded in the medical literature. Citing earlier work, their paper states that in the absence of medical intervention, 70% of human stinging cases are fatal. Another team found an apparent link between the amount of venom a snail injects and the size of its shell, and used it to extrapolate a human lethal dose of 0.029 to 0.038 milligrams per kilogram of body weight from one historic fatal case. The venom insulin also interests diabetes researchers. A later study found that venom insulins from *Conus geographus*, the tulip cone and a third species, *Conus kinoshitai*, differ in sequence, yet all bind to and activate the human insulin receptor. Tested in zebrafish and mice, venom insulins significantly lowered blood glucose in a lab model of diabetes, which the authors say offers insight into designing new diabetes drugs. ## Frequently Asked Questions ### Can a sting from a geography cone snail kill an adult human? It can. The scientists who sequenced its venom duct describe Conus geographus as the deadliest snail on earth, and their paper, citing earlier work, states that in the absence of medical intervention, 70 percent of human stinging cases are fatal. *(Source: [Hu et al. 2012]())* ### Why does the cone snail's venom insulin work so well on fish? It is built more like a fish's insulin than a snail's. The specialized insulin in Conus geographus venom is much more similar to fish insulins than to the mollusc hormone, and it carries chemical modifications typical of the snail's other venom toxins. Injected into fish, it causes hypoglycemic shock, a condition marked by dangerously low blood glucose. *(Source: [Safavi-Hemami et al. 2015]())* ### Could geography cone snail venom help treat human disease? Possibly, one day. Venom insulins from three fish-hunting cone snails, Conus geographus among them, differ in sequence, yet all bind to and switch on the human insulin receptor. In diabetic zebrafish and mice, venom insulins significantly lowered blood sugar. The researchers say this may help guide future work on fast-acting insulin drugs, so for now it is lab research in animals. *(Source: [Ahorukomeye et al. 2019]())* ## Sources 1. [Conus geographus (geography cone snail). Animal Diversity Web, University of Michigan.]() 2. [Lorenz & Morrison (2026). Conus geographus. The IUCN Red List of Threatened Species 2026: e.T192772A251030063.]() 3. [Safavi-Hemami et al. (2015). Specialized insulin is used for chemical warfare by fish-hunting cone snails. Proceedings of the National Academy of Sciences.]() 4. [Ahorukomeye et al. (2019). Fish-hunting cone snail venoms are a rich source of minimized ligands of the vertebrate insulin receptor. eLife.]() 5. [Hu et al. (2012). Elucidation of the molecular envenomation strategy of the cone snail Conus geographus through transcriptome sequencing of its venom duct. BMC Genomics.]() 6. [Dutertre et al. (2014). Intraspecific variations in Conus geographus defence-evoked venom and estimation of the human lethal dose. Toxicon.]() *Published September 6, 2026. 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The IUCN Red List of Threatened Species 2026: e.T192772A251030063", "url": "https://doi.org/10.2305/iucn.uk.2026-1.rlts.t192772a251030063.en", "author": "Lorenz & Morrison", "datePublished": "2026", "isPartOf": { "@type": "Periodical", "name": "The IUCN Red List of Threatened Species" }, "identifier": "doi:10.2305/iucn.uk.2026-1.rlts.t192772a251030063.en" }, { "@type": "ScholarlyArticle", "name": "Specialized insulin is used for chemical warfare by fish-hunting cone snails", "url": "https://doi.org/10.1073/pnas.1423857112", "author": "Safavi-Hemami et al.", "datePublished": "2015", "isPartOf": { "@type": "Periodical", "name": "Proceedings of the National Academy of Sciences" }, "identifier": "doi:10.1073/pnas.1423857112" }, { "@type": "ScholarlyArticle", "name": "Fish-hunting cone snail venoms are a rich source of minimized ligands of the vertebrate insulin receptor", "url": "https://doi.org/10.7554/elife.41574", "author": "Ahorukomeye et al.", "datePublished": "2019", "isPartOf": { "@type": "Periodical", "name": "eLife" }, "identifier": "doi:10.7554/elife.41574" }, { "@type": "ScholarlyArticle", "name": "Elucidation of the molecular envenomation strategy of the cone snail Conus geographus through transcriptome sequencing of its venom duct", "url": "https://doi.org/10.1186/1471-2164-13-284", "author": "Hu et al.", "datePublished": "2012", "isPartOf": { "@type": "Periodical", "name": "BMC Genomics" }, "identifier": "doi:10.1186/1471-2164-13-284" }, { "@type": "ScholarlyArticle", "name": "Intraspecific variations in Conus geographus defence-evoked venom and estimation of the human lethal dose", "url": "https://doi.org/10.1016/j.toxicon.2014.09.011", "author": "Dutertre et al.", "datePublished": "2014", "isPartOf": { "@type": "Periodical", "name": "Toxicon" }, "identifier": "doi:10.1016/j.toxicon.2014.09.011" } ], "about": { "@type": "Taxon", "name": "Geography Cone Snail", "scientificName": "Conus geographus", "description": "Venom insulin that appears to be part of the \"nirvana cabal,\" a toxin mix released into the water to disorient schools of small fish, which the snail then engulfs and harpoons with a hollow radular tooth." } }, { "@type": "FAQPage", "@id": "https://animaltracks.wiki/animals/geography-cone-snail/#faq", "mainEntity": [ { "@type": "Question", "name": "Can a sting from a geography cone snail kill an adult human?", "acceptedAnswer": { "@type": "Answer", "text": "It can. The scientists who sequenced its venom duct describe Conus geographus as the deadliest snail on earth, and their paper, citing earlier work, states that in the absence of medical intervention, 70 percent of human stinging cases are fatal.", "citation": { "@type": "ScholarlyArticle", "name": "Elucidation of the molecular envenomation strategy of the cone snail Conus geographus through transcriptome sequencing of its venom duct", "url": "https://doi.org/10.1186/1471-2164-13-284", "author": "Hu et al.", "datePublished": "2012", "isPartOf": { "@type": "Periodical", "name": "BMC Genomics" }, "identifier": "doi:10.1186/1471-2164-13-284" } } }, { "@type": "Question", "name": "Why does the cone snail's venom insulin work so well on fish?", "acceptedAnswer": { "@type": "Answer", "text": "It is built more like a fish's insulin than a snail's. The specialized insulin in Conus geographus venom is much more similar to fish insulins than to the mollusc hormone, and it carries chemical modifications typical of the snail's other venom toxins. Injected into fish, it causes hypoglycemic shock, a condition marked by dangerously low blood glucose.", "citation": { "@type": "ScholarlyArticle", "name": "Specialized insulin is used for chemical warfare by fish-hunting cone snails", "url": "https://doi.org/10.1073/pnas.1423857112", "author": "Safavi-Hemami et al.", "datePublished": "2015", "isPartOf": { "@type": "Periodical", "name": "Proceedings of the National Academy of Sciences" }, "identifier": "doi:10.1073/pnas.1423857112" } } }, { "@type": "Question", "name": "Could geography cone snail venom help treat human disease?", "acceptedAnswer": { "@type": "Answer", "text": "Possibly, one day. Venom insulins from three fish-hunting cone snails, Conus geographus among them, differ in sequence, yet all bind to and switch on the human insulin receptor. In diabetic zebrafish and mice, venom insulins significantly lowered blood sugar. The researchers say this may help guide future work on fast-acting insulin drugs, so for now it is lab research in animals.", "citation": { "@type": "ScholarlyArticle", "name": "Fish-hunting cone snail venoms are a rich source of minimized ligands of the vertebrate insulin receptor", "url": "https://doi.org/10.7554/elife.41574", "author": "Ahorukomeye et al.", "datePublished": "2019", "isPartOf": { "@type": "Periodical", "name": "eLife" }, "identifier": "doi:10.7554/elife.41574" } } } ] }, { "@type": "MusicRecording", "name": "Roller Mobster", "byArtist": { "@type": "MusicGroup", "name": "Carpenter Brut" }, "genre": "French Dark Electro & EBM", "url": "https://open.spotify.com/track/7oxnK2wg8qFv8EXyyxKDJ4" } ] } ```