scubaseason

Scalloped hammerhead shark

Sphyrna lewini

Sighting evidence at North Atoll Wall, Tubbataha Reefs

Scalloped hammerhead shark

Photo: Kris Mikael Krister · CC BY

One of the ocean's most visually striking apex predators, scalloped hammerheads aggregate in the currents off Tubbataha's northern wall during the liveaboard season. Their uniquely shaped cephalofoil gives them exceptional electroreception, allowing them to detect prey buried in sand at depth. Schools of hammerheads — from a handful to dozens — are a defining pelagic encounter at this site and represent one of the best chances in Southeast Asia to see them reliably at recreational depths. Critically endangered globally due to the fin trade.

Evidence at this site

No confirmed records on file at this site

Scalloped hammerhead 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.

Also seen at other sites