scubaseason
Critically Endangered· population decreasing· assessed 2019

Scalloped hammerhead shark

Sphyrna lewini

Sighting evidence at Yonaguni Monument, Yonaguni

Scalloped hammerhead shark

Photo: Aleš Buček · © all rights reserved

Evidence at this site

45 records within 50 km

Confidence: medium

Seasonality

Jan
Feb
Mar
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May
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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