Synanceia horrida

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Synanceia horrida
Synanceia horrida Lembeh2.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Scorpaeniformes
Family: Scorpaenidae
Genus: Synanceia
Species:
S. horrida
Binomial name
Synanceia horrida
(Linnaeus, 1766)
Synonyms [2]
  • Scorpaena horridaLinnaeus, 1766
  • Synanceia trachynis Richardson, 1842

Synanceia horrida, the estuarine stonefish, hollow-cheek stonefish, horrid stonefish, rough stonefish or true stonefish, is a species of venomous, marine ray-finned fish, a stonefish belonging to the subfamily Synanceiinae which is classified as being within the family Scorpaenidae, the scorpionfishes and their relatives. It is a benthic fish which is found in the Indo-Pacific region. This species is considered to be one of the most dangerous venomous fish in the world. It is a popular exhibit in public aquaria and is found in the private aquarium trade.

Contents

Taxonomy

Synanceia horrida was first formally described in 1766 as Scorpaena horrida by Carl Linnaeus in volume 1 of his 1766 Systema naturae sive regna tria naturae with its type locality given as Ambon Island in Indonesia. [3] In 1856 Eugène Anselme Sébastien Léon Desmarest designated this species as the type species of the genus Synanceia , which had been described in 1801 by Marcus Elieser Bloch and Johann Gottlob Theaenus Schneider. [4] The specific name horrida means “dreadful” or “frightful” and is an allusion to its appearance rather than its dangerously venomous spines. [5]

Description

Synanceia horrida is a drab coloured benthic fish which can be brownish-grey to reddish or greenish-brown. The skin has no scales but is covered in warts and often has growths of filamentous algae on it. The head is depressed with small, widely spaced eyes which sit high on the head and are upwards directed. There is a deep pit behind and under each eye. The large mouth is almost vertical and has a wide gape and fringing cirrhi on the lips. The pectoral fins are large and fleshy. [6] There are 13 or 14 spines and 6 soft rays in the dorsal fin, [2] the second to fourth spines being longer than the others. [6] The anal fin has 3 spines and 5 soft rays. This species reaches a maximum total length of 60 cm (24 in). [2]

Synanceia horrida Day Synanceia horrida Day.png
Synanceia horrida Day

Distribution and habitat

Synanceia horrida is found in the Indo-Pacific region where it extends from the eastern coast of India to Papua New Guinea, north to southern Japan and south to Australia. [1] In Australia it is found from Shark Bay in Western Australia around the tropical northern coast to Coffs Harbour in New South Wales. The estuarine stonefish is found on sheltered inshore reefs and in estuaries, frequently in the shallowest water in coral rubble and rocks on reef flats, as well as in seagrass beds. [6]

Biology

Synanceia horrida is camouflaged, unlike many venomous species which use bright aposematic colouration to warn off potential predators, and resembles a stone resting on the bottom. It scoops out a depression in the substrate with its large pectoral fins and curls its tail around its body to enhance this camouflage. [7] It is a nocturnal ambush predator, preying on smaller fishes, crustaceans and cephalopods. [6] The large mouth is used to suck in prey which swims close enough to be engulfed. [7] This species can tolerate being out of the water for up to 24 hours. Little is known about its reproductive biology, other than it is sexual. [8] However, the females are larger than the males and it has been observed spawning in aggregations in shallow water over a silt substrate in Queensland. [9]

Venom

Synanceia horrida is, like other stonefishes, regarded as one of the most dangerous venomous fishes. Each fin spine has a fleshy cover at its base where there are two venom-producing glands. When the fish is disturbed, it erects its spines; if the fish is stepped on, the spines act like hypodermic syringes, injecting venom into the wounds. The venom has effects on the cardiovascular and neuromuscular systems. The sting is extremely painful and has been known to be lethal. Antivenom can be administered following envenomation. Since European settlement, there have been no recorded deaths in Australia as a result of stonefish venom, but such deaths have been recorded elsewhere in its range. [6] Immersion of the sting wound in hot water can also be used to denature the venom. [7]

Utilisation

Synanceia horrida is popular as a new exhibit in public aquaria and are sometimes traded in the home aquarium trade. [10] They are occasionally taken by subsistence fisheries, appear in some Asia live fish markets, [1] and have been considered as a potential species for aquaculture. [9]

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References

  1. 1 2 3 Motomura, H.; Matsuura, K. & Khan, M. (2018). "Synanceia horrida". IUCN Red List of Threatened Species . 2018: e.T114179968A116344072. doi: 10.2305/IUCN.UK.2018-2.RLTS.T114179968A116344072.en . Retrieved 18 November 2021.
  2. 1 2 3 Froese, Rainer; Pauly, Daniel (eds.) (2022). "Synanceia horrida" in FishBase. February 2022 version.
  3. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Synanceia". Catalog of Fishes . California Academy of Sciences . Retrieved 15 April 2022.
  4. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Synanceiinae". Catalog of Fishes . California Academy of Sciences . Retrieved 15 April 2022.
  5. ↑ Christopher Scharpf & Kenneth J. Lazara, eds. (10 March 2022). "Order Perciformes (Part 10): Suborder Scorpaenoidei: Families Apistidae, Tetrarogidae, Synanceiidae, Aploacrinidae, Perryenidae, Eschmeyeridae, Pataceidae, Gnathanacanthidae, Congiopodidae and Zanclorhynchidae". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 12 April 2022.
  6. 1 2 3 4 5 Bray, D.J. (2020). "Synanceia horrida". Fishes of Australia. Museums Victoria. Retrieved 16 April 2022.
  7. 1 2 3 "Hollow-cheeked stonefish Synanceia horrida Family Synanceiidae". Wild Singapore. October 2020. Retrieved 16 April 2022.
  8. ↑ "Estuarine Stonefish Synanceia horrida". Western Australian Museum. Retrieved 16 April 2022.
  9. 1 2 D.G Fewings & L.C. Squire (1999). "Notes on reproduction in the estuarine stonefish Synanceia horrida" (PDF). SPC Live Reef Fish Information Bulletin. 5 (April 1999): 31–33.
  10. ↑ "Estuarine stonefish". Saltwater aquarium fish database. Retrieved 16 April 2022.
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