Critically Endangered· population decreasing· assessed 2019

Hammerhead Shark

Sphyrna lewini

Confirmed at 7 dive sites in the atlas

Photo: Kris Mikael Krister · CC BY

Best months across all sites

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Where to see it

Bajo CopéManta / La Plata Island, EcuadorSeasonal→
Caban Point (Anilao)Verde Island Passage, PhilippinesSeasonal→
Deep PinnacleOsezaki, JapanSeasonal→
La CorbeteñaPuerto Vallarta, MexicoSeasonal→
La Grande Anse PinnaclesRéunion Island, FranceSeasonal→
Ogasawara IslandsOgasawara, JapanSeasonal→
ChomoniMitsamiouli, ComorosRare→

How is this calculated?

Reliability ratings are based on how consistently divers have reported this species at each site. Year-round means confirmed across multiple seasons. Seasonal means reliable during specific months only. Rare means occasional or unverified records. All sightings are cross-referenced against iNaturalist quality-grade observations.