The Galápagos Islands

Whitetip Shark

Triaenodon obesus
Seen in one of the lagoons visited from Punta Moreno on Isabela

Sallylightfoot Crab

Grapsus grapsus
Sallylightfoot crabs are primitive crabs: they breathe through gills and can't wander too far away from the shoreline: they need to be constantly drenched by waves when they're out of the sea.

In the absence of more reliable information, I'm assuming that this is a Sallylightfoot immature.

Galápagos Cotton

The flower was in bloom on Isabela.