What is "culebrita"

Isla Culebrita (little Culebra, little snake) is a small, uninhabited island off the eastern coast of Culebra, Puerto Rico and is part of the Puerto Rico Archipelago. Together with Cayo Botella off the northwestern point, and Pelá and Pelaita to the west, it belongs to the barrio Frailes of Culebra. It is a nature reserve and is part of the Culebra National Wildlife Refuge. The island is home to Culebrita Lighthouse, one of the oldest lighthouses in the Caribbean. Culebrita is only accessible by private boat from the main island of Culebra.