The Banded Diadem Urchin, Diadema savignyi, is a species of sea urchin found in tropical and subtropical waters worldwide. Its striking appearance, characterized by long, black spines banded with white, makes it a prominent feature of coral reefs and rocky shores.
Description & Characteristics
The Diadema savignyi is easily recognizable by its distinctive black spines, which can grow up to 10 centimeters in length. These spines are banded with white, creating a striking visual contrast against the urchin’s dark body. Its body, or test, is typically 5 to 10 centimeters in diameter, covered in these formidable spines that serve as a defense mechanism against predators. The urchin also possesses numerous tiny tube feet that aid in movement and feeding.
Habitat and Occurrence
The Diadema savignyi is a common inhabitant of coral reefs, rocky shores, and seagrass beds in tropical and subtropical waters. It is often found in shallow waters, typically in depths of 1 to 50 meters, and is particularly prevalent in the Indo-Pacific region. It is an important part of the marine ecosystem, playing a role in the health and stability of these habitats.
Taxonomy
The Diadema savignyi belongs to the Class: Echinoidea, Order: Diadematoida, and Family: Diadematidae. These families are known for their long, slender spines, and are an important part of the marine ecosystem.
Feeding
The Diadema savignyi is a herbivore, primarily feeding on algae. It uses its sharp mouthparts to scrape algae off rocks and corals, playing a vital role in regulating algal growth and maintaining the health of coral reefs.
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