Vegetation on the island includes the Yellow Poui, Giant Cactus, Hog Plum, Silk Cotton, Agave, Manicou Fig, Naked Indian, Pelican Flower, Queen-of-the-Forest (Filipendula occidentalis), Cow Itch, Sugar Apple and Salt-fish Wood.

[citation needed] Legend has it that another cave on the island, William Dampiers Tunnel, has a pirate's treasure chest which is easily accessible on certain days of the year.

Located on the Southwestern end of Gaspar Grande, Point Baliene is one of the main drop off sites for visitors to the Gasparee Caves.

Given their ability to easily move over the narrow sea straights between both Trinidad and Venezuela, the most specious class of terrestrial vertebrates on the island are the birds.

There are a few mammals known from the island, inclusive of the Southern opossum and several species of bats that make use of the limestone cave and sinkhole systems, tree cavities and even human built structures present.