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The scrawled cowfish (Acanthostracion quadricornis) is a species of boxfish native to the western tropical and equatorial Atlantic, as well as the Gulf of Mexico. They range in size from 8–15 inches (20–38 cm), with a maximum length of 18 inches (46 cm), and can be found at depths between 6 and 80 feet (1.8 and 24.4 m). It is common to occasional in Florida and Bahamas; occasional to uncommon in the Caribbean. It also occurs in the Gulf of Mexico, north to Massachusetts, Bermuda and south to Brazil in tropical and warm temperate waters.

Scrawled cowfish
Acanthostracion quadricornis Scrawled cowfish
Conservation status

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Tetraodontiformes
Family: Ostraciidae
Genus: Acanthostracion
Species:
A. quadricornis
Binomial name
Acanthostracion quadricornis
(Linnaeus, 1758)

Reproduction


The scrawled cowfish spawns during the months of January and February, and July through September. They release the eggs in pelagic waters and eventually settle as juveniles out of the water column.


Description


Acanthostracion quadricornis
Acanthostracion quadricornis
Acanthostracion quadricornis, juvenile
Acanthostracion quadricornis, juvenile

It has distinctive features such as a scrawled pattern of bluish markings covering its body; a blue line runs from snout to anal fin and it has a pair of sharp spines above each eye, giving the name "cowfish" because they resemble the horns of a cow. This latter point distinguishes cowfish from trunkfish. Overall it is colored blue-green to yellow cast. However, it may darken, pale and change color. Significantly it has two sharp spines in front of anal fin. Pelvic fins and spiny dorsal fin are not found on the cowfish. Almost always there will be dark, blotchy spots along the body, and three to four horizontal lines on the cheek. They have usually less than fifteen teeth in each jaw. As with other species of boxfish, the scrawled cowfish's bony carapace gives it a distinctly angular appearance; its oblate form has been compared to a frisbee.[2]


Habitat


Because the scrawled cowfish is a shallow water species, it will mostly always be found in and along grass beds. If disturbed it may remain motionless apparently relying on camouflage.


Diet


The scrawled cowfish likes to eat small invertebrates such as crabs, other crustaceans, sea anemones, sponges, gorgonians,[3] and tunicates. It also will feed on some species of marine vegetation.


Importance to humans


Acanthostracion quadricornis as part of a dish in Margarita Island
Acanthostracion quadricornis as part of a dish in Margarita Island

Scrawled cowfish can be quite tasty if cooked properly. It is locally abundant in the Caribbean region and often sold fresh. Although they are very good to eat, in many places around the world they are used as an aquarium fish because of their beautiful coloration.


Notes


  1. Leis, J.L.; Matsuura, K.; Shao, K.-T.; Hardy, G.; Zapfe, G.; Liu, M.; Jing, L.; Robertson, R.; Tyler, J. (2015). "Acanthostracion quadricornis". IUCN Red List of Threatened Species. 2015: e.T193647A2253412. doi:10.2305/IUCN.UK.2015-4.RLTS.T193647A2253412.en. Retrieved 19 November 2021.
  2. Cara Giaimo, "How the World's Squarest Fish Gets Around", in The New York Times, 15 Apr. 2020.
  3. https://sta.uwi.edu/fst/lifesciences/sites/default/files/lifesciences/images/Acanthostracion%20quadricornis-%20Scrawled%20Cowfish.pdf [bare URL PDF]

References





На других языках


- [en] Scrawled cowfish

[es] Acanthostracion quadricornis

Acanthostracion quadricornis es una especie de peces de la familia Ostraciidae en el orden de los Tetraodontiformes.



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