Common name: Parvocaulis parvulus

General information

Parvocaulis parvulus, commonly known as the Red Sea Feather Star, is a species of crinoid, a type of echinoderm related to sea urchins and starfish. Feather stars are characterized by their feather-like arms which they use for filter feeding and locomotion. Parvocaulis parvulus is notable for its vibrant coloration and intricate arm structure, making it a visually appealing addition to the reef aquarium.

Care

Caring for Parvocaulis parvulus requires a well-established aquarium with stable water conditions. They prefer moderate to strong water flow to facilitate their filter feeding habits. It's important to provide them with plenty of live rock or similar structures to cling to with their cirri, which are specialized appendages for attachment. Feather stars are sensitive to changes in water quality, so regular maintenance and monitoring are crucial.

Reproduction

Feather stars like Parvocaulis parvulus reproduce both sexually and asexually. Sexual reproduction involves the release of gametes into the water column, while asexual reproduction can occur through the breaking off and regeneration of arms. In the aquarium, sexual reproduction is less common, but hobbyists may observe asexual reproduction if conditions are favorable.

Symbiosis

While not known for specific symbiotic relationships like those seen in clownfish and anemones, feather stars can contribute to the overall health of the reef ecosystem by providing microhabitats for small organisms and participating in nutrient cycling through their filter feeding.

Habitat

Parvocaulis parvulus is native to the Red Sea and surrounding waters. They are typically found in reef environments where they can attach to substrates and extend their arms into the water column to capture plankton and other small particles for food.