Endangered· population decreasing· assessed 2019

Pelagic Thresher Shark

Alopias pelagicus

Sighting evidence at Cobrador Island, Romblon

Pelagic thresher sharks visit the cleaning stations off Cobrador's wall most reliably at dawn, when wrasse and cleaner shrimp service them in the water column above the reef. These solitary sharks use their elongated tail to stun schooling fish and are among the most visually striking megafauna in Philippine waters. Early morning dives before 7am produce the most consistent encounters.

Evidence at this site

No confirmed records on file at this site

Pelagic Thresher Shark 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.

Pelagic Thresher Shark

Evidence at this site

Also seen at other sites