Common name: white starfish

General information

The Spiny Sea Star, scientifically known as Coscinasterias tenuispina, is a striking marine invertebrate that adds both beauty and intrigue to a saltwater aquarium. This species is characterized by its multiple arms, which can range from five to eleven, and its spiny, textured surface. The coloration of these sea stars can vary widely, including shades of brown, green, and purple, often with mottled patterns that help them blend into their natural surroundings.

Care

C. tenuispina requires a well-established aquarium with ample live rock and a sandy substrate to thrive. They are omnivorous and will scavenge for detritus, but they also need a diet supplemented with meaty foods such as chopped clams, mussels, or shrimp. It's important to monitor their feeding to ensure they are getting enough nutrition, as they can be slow and methodical feeders.

Reproduction

In the wild, Coscinasterias tenuispina reproduces both sexually and asexually. Sexual reproduction involves the release of eggs and sperm into the water column, while asexual reproduction occurs through arm detachment and regeneration. In the aquarium, asexual reproduction is more commonly observed, with new individuals growing from detached arm segments.

Symbiosis

While not known for any specific symbiotic relationships, sea stars like C. tenuispina play a crucial role in the ecosystem by helping to control algae growth and by consuming detritus, thus contributing to the overall health of the reef environment.

Habitat

The Spiny Sea Star is found in a variety of marine environments, from rocky shores to coral reefs. They are typically found at depths ranging from the intertidal zone to deeper waters. In the aquarium, they require stable water conditions and should not be housed with predatory fish or other creatures that may harm them.