At Prison Island, you will able to See Aldabra Giant Tortoise, Peacocks, Dik-dik (species of small Antelope), Prison ruins, etc.
Aldabra Giant Tortoises are endemic to the Aldabra Atoll in Seychelles and they do not live in the wild anywhere else in the world. There are found in Zanzibar because they were gifted from Seychelles in 1919. They are one of the world's longest-living animals, the oldest one at Prison Island is 197 years.
Also, you will be able to see Peacocks and Dik-diks (Small Antelopes that are native to East Africa).
Lastly will go see the Prison Ruins which was the main reason why the Island was named Prison Island.