Choriaster

Choriaster
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Echinodermata
Class: Asteroidea
Order: Valvatida
Family: Oreasteridae
Genus: Choriaster
Lütken, 1869[1]
Species:
C. granulatus
Binomial name
Choriaster granulatus
Lütken, 1869
Detail view

Choriaster is a monotypic genus in the family Oreasteridae, containing the single species Choriaster granulatus, commonly known as the granulated sea star. Other common names include big-plated sea star, hunter-five sea star and doughboy starfish.[2]

Description

Choriaster granulatus has a convex body and five short arms with rounded tips. Relatively large in comparison with other sea stars, its maximum radius is about 27 cm (11 in). It is most commonly pale pink in colour with brown papillae radiating out from the centre but can also be colours ranging from grey to yellow and even red.[3][4]

Location

This species is found in numerous tropical waters, including:[5]

Habitat

Choriaster granulatus in Madagascar

Choriaster granulatus live individually or in groups along coral reefs in the Indo-West Pacific region, from East Africa all the way to Fiji.[7][3] They have been found in the Indian Ocean, Red Sea and the Great Barrier Reef.[3] The sandy habitat where it tends to live is characterized by rubble slopes and detritus,[citation needed] also being found living among corals and sea sponges.[7] Choriaster granulatus prefer shallow waters ranging from 1.5 to 53 m (5 to 174 ft) deep and above average temperatures of 24 to 29 °C (75 to 84 °F).[8]

Choriaster granulatus in Occidental Mindoro, Philippines

Diet

Choriaster granulatus is a carnivore that, like other sea stars, has its mouth on the underside of its body. Food is digested and absorbed outside of its body by forcing its stomach out of its mouth onto the food.[2] Its food includes small invertebrates such as coral polyps as well as carrion.[7]

Life cycle and reproduction

Sea star embryos hatch into planktonic larvae before becoming juvenile sea stars with five arms. The Asteroidea class of organisms reproduce both asexually and sexually.[7]

Threats

The arms of Choriaster granulatus can become deformed when small parasitic limpets attach to their underside.[2] They are also threatened by habitat loss due to ocean acidification which can lead to coral bleaching.[9]

References

  1. ^ C.L. Mah (2010). "Asteroidea taxon details for Choriaster Lütken, 1869". World Asteroidea Database. Retrieved 29 June 2011.
  2. ^ a b c "The Granulated Sea Star". WHATSTHATFISH.com. Retrieved 19 March 2018.
  3. ^ a b c "Taxonomic". domainsoflife.yolasite.com. Archived from the original on 19 March 2018. Retrieved 19 March 2018.
  4. ^ Antokhina, Tatiana I.; Britayev, Temir A. (2020). "Host recognition behaviour and its specificity in pontoniine shrimp Zenopontonia soror (Nobili, 1904) (Decapoda: Caridea: Palaemonidae) associated with shallow-water sea stars". Journal of Experimental Marine Biology and Ecology. 524 151302. Bibcode:2020JEMBE.52451302A. doi:10.1016/j.jembe.2019.151302. S2CID 213212469.
  5. ^ "Marine Fish Picture Gallery – Granulated Seastar picture". Archived from the original on 27 December 2021. Retrieved 19 February 2011.
  6. ^ Choriaster granulatus, granular sea star
  7. ^ a b c d "Choriaster granulatus, granular sea star". www.sealifebase.org. Retrieved 19 March 2018.
  8. ^ "Granulated Sea Star – Choriaster granulatus – Details – Encyclopedia of Life". Encyclopedia of Life. Retrieved 19 March 2018.
  9. ^ Pendleton, Linwood; Hoegh-Guldberg, Ove; Albright, Rebecca; Kaup, Anne; Marshall, Paul; Marshall, Nadine; Fletcher, Steve; Haraldsson, Gunnar; Hansson, Lina (2019). "The Great Barrier Reef: Vulnerabilities and solutions in the face of ocean acidification". Regional Studies in Marine Science. 31 100729. Bibcode:2019RSMS...3100729P. doi:10.1016/j.rsma.2019.100729. S2CID 199095368.
allikas: https://en.wikipedia.org/wiki/Choriaster_granulatus