Synanceia

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Genus of venomous fishes

title: "Synanceia" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["synanceiini", "synanceia", "fish-of-the-pacific-ocean", "fish-of-the-indian-ocean", "marine-fish-genera", "taxa-named-by-marcus-elieser-bloch", "taxa-named-by-johann-gottlob-theaenus-schneider"] description: "Genus of venomous fishes" topic_path: "geography/india" source: "https://en.wikipedia.org/wiki/Synanceia" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of venomous fishes ::

| image = Ichthyologie; ou, Histoire naturelle des poissons (Plate 183) (6918426608).jpg | image_caption = Synanceia horrida, 1796 illustration | display_parents = 3 | taxon = Synanceia | authority = Bloch and J. G. Schneider, 1801 | type_species = Scorpaena brachion | type_species_authority = Linnaeus, 1766 | synonyms = {{Genus list | Barffianus | Curtiss, 1944 | Bufichthys | Swainson, 1839 | Deleastes | Seale, 1906 | Emmydrichthys | Jordan & Rutter, 1896 | Nofua | Whitley, 1930 | Phrynichthys | Agassiz, 1846 | Synanceichthys | Bleeker, 1863 | Synancidium | Müller, 1843 | synonyms_ref =

Synanceia is a genus of ray-finned fish belonging to the subfamily Synanceiinae, commonly known as the stonefish, which is classified within the family Scorpaenidae, the scorpionfish and close relatives. Stonefish are the most venomous fish known; stings can be fatal to humans. They are found in the coastal regions of the Indo-Pacific. They are sometimes confused with the freshwater lionfish.

Taxonomy

Synanceia was first described as a genus in 1801 by the German naturalists Marcus Elieser Bloch and Johann Gottlob Theaenus Schneider with Scorpaena horrida, which had been described by Carl Linnaeus in 1766 from Ambon Island (Indonesia), as its type species. The genus Synanceia is classified within the tribe Synanceiini which is one of three tribes in the subfamily Synanceeinae within the family Scorpaenidae. Despite this, other authorities regard Synanceiidae as a valid family and the Synanceiini as the subfamily Synanceiinae.

Species

::figure[src="https://upload.wikimedia.org/wikipedia/commons/5/57/Stone_Fish_at_AQWA_SMC2006.jpg" caption="''[[Synanceia verrucosa]]'' in a public aquarium"] ::

Synanceia contains the following species: ::data[format=table]

ImageScientific nameCommon nameDistribution
Synanceia alula (Eschmeyer & Rama Rao, 1973)Midget stonefishnorthern Indian Ocean to the Solomon Islands
[[File:Synanceia horrida Lembeh2.jpg120px]]Synanceia horrida (Linnaeus, 1766)Estuarine stonefish
[[File:Synanceia nana.JPG120px]]Synanceia nana (Eschmeyer & Rama Rao, 1973)Red Sea stonefish
Synanceia platyrhyncha (Bleeker, 1874)Indonesia
[[File:Stone Fish at AQWA SMC2006.jpg120px]]Synanceia verrucosa (Bloch and J. G. Schneider, 1801)Reef stonefish
Synanceia quinque Matsunuma, Manjaji‑Matsumoto & Motomura, 2021Indonesia
::

Habitat and characteristics

Synanceia are primarily marine, and although some species are known to live in rivers, most live in coral reefs near the tropical Pacific and Indian oceans. The species has potent neurotoxins secreted from glands at the base of their needle-like dorsal fin spines which stick up when disturbed or threatened. The vernacular name of the species, the stonefish, derives from its grey and mottled camouflage similar to the color of a stone. Swimmers may not notice them and inadvertently step on them, triggering a sting. When the stonefish is disturbed, it may inject an amount of venom proportional to the amount of pressure applied to it. Stonefish have the ability to extend sharp, specialized spines (lachrymal saber) as an additional defense mechanism.

Venom

The venom of Synanceia consists of a proteinaceous toxin called verrucotoxin (VTX), which modulates Ca2+ channel activity through the β-adrenoceptor-cAMP-PKA pathway. In humans, stings can cause intense pain, respiratory weakness, damage to the cardiovascular system, convulsions and paralysis; sometimes they can lead to death. The exact mechanism is not yet fully understood.

Treatment of envenomation

Stonefish stings are injuries which may include envenomation and mechanical trauma. They are extremely painful and potentially lethal. There are a number of species of venomous fish including the stonefish. The two most recommended treatments are the application of heat to the affected area and antivenom. Hot water (at a temperature of at least 45 °C) applied to the injured area has been found to denature stonefish venom, and causes minimal discomfort to the victim. Antivenom is used in more extreme cases. Vinegar is found on some Australian beaches as it is said to lessen the pain.

Stonefish stings in Australia

The stonefish is the most venomous known fish in the world and stings can cause death if not treated. Most stonefish stings occur as a result of stepping on the creature which forces venom into the foot, while it is less common for the fish to sting when it is picked up. Stonefish stings can occur on the beach, not just in the water, since stonefish can survive out of the water for up to 24 hours. They are not easily seen as they look similar to rocks or coral. Stonefish antivenom is the second-most administered in Australia.

Some Indigenous Australians have corroborees which involve reenacting the death of someone who trod on the fish. The aboriginal people of Northern Australia and the Great Barrier Reef have ways of preparing the fish for eating to avoid poisoning.

After stonefish envenomation, the amount of anti-venom given depends on the number of puncture wounds from the stonefish spines.

Number of incidents

::figure[src="https://upload.wikimedia.org/wikipedia/commons/7/75/Poisonous_Stone_Fish_article_1936.jpg" caption="The Argus]]'' about venomous stonefish."] ::

There were 25 cases of the use of antivenom for stonefish reported to Commonwealth Serum Laboratories for a one-year period between July 1989 and June 1990, with most from Queensland and four from the Northern Territory. There were 14 calls to the Queensland Poisons Information System in 2008 regarding stonefish poison.

Fatal incidents

::data[format=table]

NameAgeDateLocation
Joseph Leathom Wassell417 April 1915Thursday Island, Australia
name not given586 August 2010Nago, Okinawa, Japan
::

As food

Synanceia are edible to humans if properly prepared. The protein-based venom breaks down quickly when heated, and raw stonefish served as part of sashimi is rendered harmless simply by removing the dorsal fins which are the main source of venom. The fish are considered a delicacy in many parts of Asia, including south Japan, south Fujian, Guangdong in China, Hong Kong and some parts of Vietnam. In the Hokkien-speaking area, they are considered delicacies and good for health. The meat of Synanceia is white, dense and sweet and the skin is edible. They are usually cooked with ginger into a clear soup and sometimes served raw as sashimi.

References

References

  1. {{Cof family
  2. (2003). "Smiths' Sea Fishes". Penguin Random House South Africa.
  3. "Puffer Fish".
  4. {{Cof genus | genus = Synanceia | access-date = 14 April 2022}}
  5. (2016). "Fishes of the World". Wiley.
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  7. "Notesthe robusta - Family Scorpaenidae". O'Connor，J. Southern Cross University.
  8. Pocock, C.A. "[http://eprints.utas.edu.au/629/4/Pocock_CH-2.pdf Romancing the Reef: history, heritage and the hyper-real]." ''James Cook University Ph.D. Thesis.'' 2003. Accessed 2009-06-14.
  9. Smith, W. Leo. (February 2018). "Phylogeny and Taxonomy of Flatheads, Scorpionfishes, Sea Robins, and Stonefishes (Percomorpha: Scorpaeniformes) and the Evolution of the Lachrymal Saber". Copeia.
  10. Willingham, AJ. (April 13, 2018). "Stonefish are already scary, and now scientists have found they have switchblades in their heads". CNN.
  11. Yazawa, K. (August 2007). "Verrucotoxin, a stonefish venom, modulates calcium channel activity in guinea-pig ventricular myocytes.". Br J Pharmacol.
  12. (2006-01-01). "Textbook of Paediatric Emergency Medicine". Elsevier Health Sciences.
  13. "The Most Excruciating Pain Known to Man | Scienceray".
  14. (September 2020). "Is stonefish Synanceia verrucosa envenomation potentially lethal?". Toxicon.
  15. (December 2023). "Stonefish (Synanceia spp.) Ichthyocrinotoxins: An ecological review and prospectus for future research and biodiscovery". Toxicon.
  16. (February 2018). "Biochemical and histopathological effects of the stonefish (Synanceia verrucosa) venom in rats". Toxicon.
  17. (2013). "Havard's Nursing Guide to Drugs". Elsevier Health Sciences.
  18. White, Julian. (2013). "A Clinician's Guide to Australian Venomous Bites and Stings: Incorporating the Updated Antivenom Handbook". CSL Ltd..
  19. Taylor, G.. (2000). "Toxic fish spine injury: Lessons from 11 years experience". South Pacific Underwater Medicine Society Journal.
  20. [http://www.adventuremedicine.net/envenom/marine/94-stonefish Stonefish Envenomation], adventure medicine {{Webarchive. link. (28 February 2012)
  21. [https://www.emed.theclinics.com/article/S0733-8627(16)30118-3/abstract Marine Envenomation], Hornbeak, Kirsten B., and Paul S. Auerbach. Emergency Medicine Clinics 35.2 (2017): 321–337.
  22. "CSL Antivenom Handbook - Stonefish Antivenom".
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  24. [http://nla.gov.au/nla.news-article11021024 The Poisonous Stone Fish Dreaded Denizen of the North] The Argus 14 March 1936
  25. [http://www.csl.com.au/docs/236/440/Stone%20Fish%20PI-%20approved%20April%202011.pdf Stonefish antivenom] product information {{Webarchive. link. (29 March 2012)
  26. [http://www.carpa.org.au/Ref%20Manual%204th%20Ed/Emergency%20&%20assessment/Marine_stings_bites.pdf Marine Bites and Stings] Dr Mark Little {{Webarchive. link. (21 March 2014)
  27. [http://www.health.qld.gov.au/poisonsinformationcentre/docs/qpic_ann_report_2008.pdf annual report 2008], Queensland Poisons Information Centre
  28. Design, UBC Web. "Dr Joseph Leathem Wassell - Monument Australia".
  29. [http://www.carpa.org.au/Ref%20Manual%204th%20Ed/Emergency%20&%20assessment/Marine_stings_bites.pdf Marine Bites and Stings] Dr Mark Little {{Webarchive. link. (21 March 2014)
  30. "Okinawan diver dies from stonefish sting".

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synanceiinisynanceiafish-of-the-pacific-oceanfish-of-the-indian-oceanmarine-fish-generataxa-named-by-marcus-elieser-blochtaxa-named-by-johann-gottlob-theaenus-schneider