Slate Pencil Urchin

Heterocentrotus mammillatus

Sighting evidence at Gili Biaha, Candidasa

Photo: Donna Pomeroy · CC BY-NC

Evidence at this site

No confirmed records on file at this site

Slate Pencil Urchin is listed as a curated species here based on historical reports.

How is this calculated?

Sighting evidence is compiled from iNaturalist observation records within a set proximity radius, filtered for quality-grade observations. “Last confirmed” is the date of the most recent research-grade record. Record count covers a rolling 24-month window. Confidence reflects record count, recency, and consistency of seasonal signal.