Strongylocentrotus purpuratus

Strongylocentrotus purpuratus 1

Strongylocentrotus purpuratus 020313

Strongylocentrotus purpuratus California

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Strongylocentrotus purpuratus

Strongylocentrotus purpuratus

Strongylocentrotus purpuratus

Strongylocentrotus purpuratus, commonly known as the purple sea urchin, is a species of sea urchin belonging to the family Strongylocentrotidae. It is found in the eastern Pacific Ocean along the coast of North America, from Alaska to Baja California.

Description

The purple sea urchin has a hard, spherical shell called a test, which is covered with long, movable spines. The test is typically a deep purple color, although it can sometimes appear reddish or dark brown. The spines are used for protection and locomotion. The mouth, located on the underside, contains a specialized feeding structure known as Aristotle's lantern, which is used to scrape algae and other food from rocks.

Habitat

Strongylocentrotus purpuratus is commonly found in the intertidal and subtidal zones, from the low tide mark to depths of about 160 meters. It prefers rocky substrates where it can graze on algae and kelp. This species plays a significant role in the ecosystem as a grazer, helping to control the growth of algae and maintain the balance of the marine environment.

Reproduction

The purple sea urchin is a broadcast spawner, releasing eggs and sperm into the water column where fertilization occurs. The larvae are planktonic and undergo several developmental stages before settling to the ocean floor and metamorphosing into juvenile sea urchins. This reproductive strategy allows for wide dispersal of offspring.

Ecological Importance

Strongylocentrotus purpuratus is an important species in its ecosystem. It serves as a key grazer of algae, preventing overgrowth that can smother other marine life. Additionally, it is a prey item for various predators, including sea otters, starfish, and certain species of fish.

Research Significance

This species is of particular interest to scientists due to its well-documented genome. The purple sea urchin was one of the first marine organisms to have its genome sequenced, providing valuable insights into developmental biology, evolution, and genomics.

Conservation

While not currently considered endangered, the purple sea urchin faces threats from habitat destruction, pollution, and climate change. Conservation efforts focus on protecting its natural habitats and mitigating the impacts of human activities on marine ecosystems.

Related Pages

• Sea urchin
• Strongylocentrotidae
• Aristotle's lantern
• Intertidal zone
• Kelp forest

Categories

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Strongylocentrotus purpuratus
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	Echinoida
Family:	Strongylocentrotidae

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