Ophioplocus
Ophioplocus is a genus of brittle stars belonging to the family Ophiocomidae. These echinoderms are commonly found in intertidal and subtidal zones of the Pacific Ocean, with some species inhabiting the Atlantic Ocean as well. Brittle stars, including those in the Ophioplocus genus, are characterized by their flexible, star-shaped bodies with five long arms. They are often described as being “serpent stars” due to their sinuous movements. They are highly diverse in their habitats and are known to be ecologically important in marine ecosystems.
Common Names
Members of the Ophioplocus genus are known by various common names, including:
- Northern Pacific Brittle Star (Ophioplocus esmarki)
- California Brittle Star (Ophioplocus januarii)
- Pacific Brittle Star (Ophioplocus januarii)
- Spiny Brittle Star (Ophioplocus januarii)
Characteristics
Ophioplocus species share several distinct characteristics:
- Five long, flexible arms that are covered with spines and scales.
- Central disk that is relatively large compared to the arms.
- Absence of a madreporite on the dorsal surface of the central disk, a feature that distinguishes them from other brittle star genera.
- Presence of a pair of tentacle pores on each arm, which are openings for feeding and sensory structures.
- Various colors, including brown, red, orange, and yellow, depending on the species and their environment.
Environment
Ophioplocus species typically inhabit:
- Intertidal zones, where they can be found on rocky shores, in tide pools, and among seaweeds.
- Subtidal zones, ranging from shallow depths to deeper areas, often associated with kelp forests and other benthic communities.
References
For further information, please consult the following sources: