Dolphins are becoming one of the hallmarks of the Algarve. The number of dolphins on the Algarve coast has been increasing and there is a growing demand for dolphin watching. In the Algarve there are two predominant species, the common dolphin (Delphinus delphis L.) and the bottlenose dolphin (Tursiops truncatus).
Due to the number of boats owned by Passeios da Ria Formosa, the chances of watching dolphins in the wild are usually around 95% which is outstanding in this area!
There is also the possibility of seeing orcas, also known as killer whales. Although the odds are smaller, the Atlantic Ocean is part of their migration path and this is undoubtedly a unique moment. Common dolphins are more "playful", often jumping and accompanying the boat, something the younger ones love. While bottlenose dolphins are larger in size, they are usually more timid, although they are generally very friendly.
The scenery on the high sea is beautiful when the Dolphins alongside the boats, entertaining kids and adults.
More info here