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Leptasterias aequalis

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Leptasterias aequalis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Echinodermata
Class: Asteroidea
Order: Forcipulatida
Family: Asteriidae
Genus: Leptasterias
Species:
L. aequalis
Binomial name
Leptasterias aequalis
(Stimpson, 1862)

Leptasterias aequalis, common names little six-rayed seastar or six-armed star, is a species of brooding starfish.[1]

This is a small species, with a total width of only about 5 centimetres (2.0 in). The coloration is extremely variable.

This seastar is found in the northeastern Pacific Ocean,[2] from Washington[3] to Southern California. It lives on rocky shores, in the mid-intertidal zone.

Many sea-stars broadcast-spawn their embryos, where fertilization occurs in the water column; however, Leptasterias species brood their embryos locally. The stars form mating aggregations and the female sits on her brood for a period of 6–8 weeks while the embryos develop underneath. Eventually, the embryos fully metamorphose into juvenile sea-stars and walk away, and thus can only locally disperse. Larger females produce larger embryos of great quality; however, as larger broods are produced, a considerable proportion of them are lost.[1]

References

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  1. ^ a b Bingham, Brian (2004). "Variability in broods of the seastar Leptasterias aequalis". Canadian Journal of Zoology. 82 (3): 457–463. doi:10.1139/z04-009.
  2. ^ "The Pacific Ocean—facts and information". Environment. 2019-03-04. Archived from the original on April 21, 2021. Retrieved 2022-05-06.
  3. ^ "Washington | State Capital, Map, History, Cities, & Facts | Britannica". www.britannica.com. Retrieved 2022-05-06.
[edit]
  • Much good information at: [1]
  • CalPhoto image 1: [2]
  • CalPhoto image 2: [3]