Marino Ballena National Park is a true refuge of biodiversity, both terrestrial and marine. In the marine section, the park includes coral reefs, sandbars, mangrove areas, and zones where deep waters meet shallow ones. These ecosystems are home to a wide variety of marine species, including turtles, dolphins, rays, sharks, and, of course, the iconic humpback whales.

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Marine Life

The park’s primary attraction is undoubtedly whale watching. Humpback whales (Megaptera novaeangliae) migrate from the cold waters of the northern hemisphere to Costa Rica's warm waters between December and April to mate and give birth. During this migration, both adult whales and their calves can be observed performing jumps and other fascinating behaviors. The peak whale-watching season is from January to March, but whales can be seen until late April.

The park is also an excellent spot for dolphin watching, with species such as the Pacific spotted dolphin (Stenella attenuata) and the common dolphin (Delphinus delphis) frequently seen jumping and swimming near boats.

Additionally, the park’s waters are home to various species of sea turtles, including the leatherback turtle (Dermochelys coriacea), one of the largest species in the world. The coral reefs, sandbanks, and nearby mangrove zones provide essential habitats for many marine species and contribute to the area's ecological cycle.

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Terrestrial Flora and Fauna

Along the park's coasts, various terrestrial ecosystems such as dry tropical forests and mangroves can be explored. These habitats are home to a wide range of wildlife, including capuchin monkeys, howler monkeys, iguanas, tropical birds, reptiles, and many insect species.

The park is especially important as a sanctuary for migratory birds seeking resting and feeding areas during their long journeys. Bird species that can be observed include toucans, macaws, hawks, and the quetzal.