White Spot Urchin

Parasalenia gratiosa

Parasalenia gratiosa, commonly known as the White Spot Urchin, is a species found in the tropical waters of the Western Pacific. These urchins inhabit a variety of environments, including both reef and non-reef-building corals, and are typically located on shore rocks. They can be found at depths ranging from 0 to 70 meters, with most records indicating they are often shallower than 40 meters. This species is characterized by its distinctive white spots, which help differentiate it from other urchins in the area. The White Spot Urchin is a benthic organism, meaning it resides on the ocean floor. It plays a role in the ecosystem by grazing on algae and other organic matter, contributing to the health of coral reefs. The reproductive strategy of this species involves external fertilization, with gonochoric traits where individuals are either male or female. Eggs are often brooded, and the resulting embryos develop into planktonic larvae before settling on the seafloor and metamorphosing into juvenile urchins. Divers may encounter the White Spot Urchin while exploring rocky shorelines or coral reefs. Observing these creatures can be intriguing, as they often blend into their surroundings, making them somewhat cryptic. Their presence is usually noted in areas with abundant algae, where they feed and contribute to the benthic community. Conservation status for this species has not been evaluated, indicating a need for further research to understand its population dynamics and ecological role.