Parvulastra
Parvulastra is a genus of sea stars in the family Asterinidae. This genus includes species that are commonly found in intertidal and subtidal zones of the Pacific Ocean. The genus is characterized by its small size, usually less than 2 cm in diameter, and its distinctive five-pointed star shape. Parvulastra species are often brightly colored, ranging from reddish-brown to orange and yellow.
Common Names
Members of this genus are commonly known as "dwarf sea stars" or "miniature sea stars." This reflects their small size compared to other sea stars.
Characteristics
Parvulastra species have several defining characteristics:
- Small size: They are generally less than 2 cm in diameter, making them some of the smallest sea stars.
- Five-pointed star shape: Like most sea stars, they possess a distinct five-pointed radial symmetry.
- Bright coloration: Parvulastra species are often brightly colored, with shades of red, orange, yellow, and sometimes even green.
- Short, stubby arms: Their arms are relatively short and stout compared to other sea stars.
- Smooth, granular surface: Their surface is typically smooth and covered in tiny granules.
Environments
Parvulastra species are found in various marine environments, including:
- Intertidal zones: They are common in tide pools and rocky shores, where they can tolerate fluctuations in salinity and temperature.
- Subtidal zones: Some species inhabit deeper, submerged areas, often associated with kelp forests and seagrass beds.
References
For further information on Parvulastra, please refer to these reliable sources: