Opuntia images - Joel Sartore

Prickly pear cactus (Opuntia) on Catalina Island.

A prickly pear cactus (Opuntia echios var. echios) on Santa Cruz Island, Galapagos National Park.

A prickly pear cactus (Opuntia echios var. echios) on Santa Cruz Island, Galapagos National Park.

A prickly pear cactus (Opuntia echios var. echios) on Santa Cruz Island, Galapagos National Park.

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