The Nodous Sea Star – Fromia nodosa is a captivating starfish species found in the tropical waters of the Indo-Pacific region. Its striking appearance and fascinating feeding habits make it a popular subject among marine enthusiasts.
Description & Characteristics
The Fromia nodosa is known for its distinctive body shape, typically possessing five arms that radiate from a central disc. Each arm features prominent, rounded nodules, giving the starfish its name. These nodules, which are actually small, blunt spines, are arranged in rows along the arms, contributing to its rough texture. The Fromia nodosa can reach a maximum size of approximately 10 centimeters in diameter, showcasing its compact form.
Habitat and Occurrence
The Nodous Sea Star – Fromia nodosa is a common sight in the shallow waters of coral reefs, typically found at depths ranging from 1 to 30 meters. This species is well-adapted to the warm, tropical waters of the Indo-Pacific region. Its presence is notable in marine zones such as the Indian Ocean, the Red Sea, and the Pacific Ocean, from the East African coast to the Philippines and Indonesia.
Taxonomy
The Fromia nodosa is classified within the phylum Echinodermata, belonging to the Class Asteroidea, Order Valvatida, and Family Goniasteridae. This classification reflects its evolutionary history and shared characteristics with other starfish species.
Feeding
The Fromia nodosa is a specialized feeder, primarily consuming algae. It is particularly fond of Spirulina, a type of blue-green algae. This dietary preference aligns it with the classification of a herbivore, playing a crucial role in maintaining the balance of the coral reef ecosystem. By grazing on algae, the Fromia nodosa helps regulate the growth of these organisms, preventing their dominance and promoting diversity within the reef.
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