Critically Endangered· population decreasing· assessed 2019

Scalloped hammerhead shark

Sphyrna lewini

Sighting evidence at Shilang & the Big Mushroom Coral, Green Island

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.

Seasonality

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

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

La Nevera (The Refrigerator)→
El Monstruo (Bajo del Monstruo)→
Yonaguni Monument→
Straits of Tiran→
Hammerhead Point (Irizaki)→