Darwin's Arch (The Pillars) · Darwin Island
5 species, most likely first·How chances work
Scalloped hammerheadCritically Endangered
Almost always
Nearly every dive
Whale sharkEndangered
The cleaning station beneath the arch (now collapsed structure) is a documented whale-shark cleaning hotspot.
Likely
About half of dives
Bottlenose dolphinLeast Concern
Galapagos sharkLeast Concern
Silky sharkVulnerable
What the labels mean
