Scalloped Hammerhead
Sphyrna lewini
Sighting evidence at The Crevice, Guam, Mariana Islands (Guam & Saipan)
Photo: Kris Mikael Krister · CC BY
Small aggregations of scalloped hammerheads appear in the blue water below the Crevice exit during Guam's cooler winter months from December through March, using the steep drop-off as a navigation landmark on a larger circuit of the island's south coast. Sightings are not guaranteed but are frequent enough that operators include the Crevice on their best-chance hammerhead itineraries.
Evidence at this site
No confirmed records on file at this site
Scalloped Hammerhead is listed as a curated species here based on historical reports.