Pisaster

In today's world, Pisaster is a topic that has captured the attention of millions of people. Whether due to its historical relevance, its impact on society or its influence on popular culture, Pisaster has become a point of interest and discussion in various areas. From its origin to its evolution over time, Pisaster has given rise to countless opinions and arguments that have enriched the panorama of knowledge around this topic. In this article, we will explore different aspects related to Pisaster, delving into its importance, its implications and its projection in the future.

Pisaster
Pisaster brevispinus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Echinodermata
Class: Asteroidea
Order: Forcipulatida
Family: Asteriidae
Genus: Pisaster
Müller and Troschel, 1840
Ochre sea star at low tide, Saltspring Island, British Columbia

Pisaster (from Greek πίσος, "pea", and ἀστήρ, "star") is a genus of Pacific sea stars that includes three species, P. brevispinus, P. giganteus, and P. ochraceus. Their range extends along the Pacific coast from Alaska to southern California in the intertidal zone. The largest individuals of Pisaster can reach diameters of up to 70 cm (28 in) across; they all develop five arms, but some may be lost from injury or disease, and occasionally the re-growth of an injured arm will result in an individual with more than five arms.

Sea stars in the genus Pisaster are all predators; the ochre sea star is the best-characterized of these, and is considered a "keystone" predator that controls the relative abundance of many other species in the ecosystem.

Species

Image Scientific name Common name Distribution
Pisaster brevispinus (Giant) pink or short-spined sea star coast of North America from Sitka, Alaska to La Jolla, California.
Pisaster giganteus Giant sea star coast of North America from Southern California to British Columbia.
Pisaster ochraceus Ochre sea star from Prince William Sound in Alaska to Baja California.

References

Wikispecies has information related to Pisaster.
  1. ^ Cleveland P. Hickman et al., Integrated Principles of Zoology (St. Louis: Times Mirror / Mosby College Pub., 1984), p. 469.


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