Evasterias
Evasterias is a genus of starfish in the family Asteriidae. They are commonly known as “sunstars” and are found in the northern Pacific Ocean, ranging from Alaska to California. They are characterized by their five arms, which are typically pointed and often have a slightly flattened appearance. Their color varies depending on the species, ranging from brown to reddish-purple, and they can reach sizes of up to 30 centimeters in diameter.
Characteristics
Members of the Evasterias genus share several key characteristics, including:
- Five arms that are typically pointed and slightly flattened
- A central disc from which the arms radiate
- Numerous tube feet on the underside of the arms
- A variety of colors, including brown, reddish-purple, and orange
- A diet primarily consisting of bivalves, snails, and other invertebrates
Environments
Evasterias species are found in a variety of marine environments, including:
- Rocky shores
- Seabeds
- Kelp forests
- Intertidal zones
They are often found in shallow waters, but some species can be found at depths of up to 200 meters.
Species
The Evasterias genus includes several recognized species, including:
- Evasterias troschelii (the most common species)
- Evasterias echinata
- Evasterias laevigata
- Evasterias mertensii
References
For further information about Evasterias, you can consult these reliable sources: