As a tribute to Darwin and his works, some locals and industry professionals have nicknamed the remaining stone "towers" the Pillars of Evolution[6] (Spanish: Los Pilares de la Evolución).

[9] From its southern tip to the sloping channel, the marine fauna seen are scalloped hammerheads, manta rays, big-eye jacks, bonito, yellowfin tuna, dolphins, big schooling of species of pelagic fish, and also whale sharks of up to 14 metres (45 ft) in length.

[10][11] Many birds are endemic and the species commonly noted is the sooty tern (Sterna fuscata), which breeds on Darwin Island.

[3] Following the collapse of the arch, the remaining columns of rock have been nicknamed the "Pillars of Evolution" (Spanish: Los Pilares de la Evolución) by locals in the tourism and diving industry.

[6][15] The nickname alludes to the arch and the nearby island having been named after Charles Darwin, whose studies of the surrounding area's wildlife contributed to the inception of his theory of evolution by means of natural selection.