The waters around the Osa Peninsula are particularly favoured by a number of species including Bottlenose, Spinner, Spotted and Common Dolphin.
If you are lucky you will be joined by dolphin pods playing at the front of your boat across Golfo Dulce or over to Caño Island.
Orcas, with distinctive black and white markings, can be seen here too, and Sperm, Blue and Pilot Whales.
Humpbacks migrate to Costa Rica from colder northerly waters, arriving between November and December to mate. They remain until March around the southern Pacific coast to give birth.