Just a short flight away from Dar Es Salaam, lies a hidden gem of a beach destination in Tanzania known as Mafia Island. This secluded paradise is home to the ocean’s gentle giants and boasts the world’s coolest fist—the awe-inspiring whale sharks.

During the months of October to February, these magnificent creatures grace the waters of Kilindoni Bay, just off the shores of Mafia Island. It is during this time that tourists have the incredible opportunity to swim alongside these majestic whale sharks, experiencing an up-close and personal encounter like no other.

According to an MMF article published in 2022, these extraordinary fish with their broad heads, forward-pointing mouths, and dark gray skin adorned with light-colored spots, have made Mafia Island their residence. The presence of fresh water nutrients pouring from the nearby Rufiji River has attracted these gentle giants to the island, just a few kilometers away.

These gigantic fish, measuring an impressive 39 feet in length, are categorized as endangered on the IUCN Red List. Yet, they grace the shallow waters of Mafia Island, surfacing gracefully to feast on their favorite menu item—plankton, which is abundant in the area. With their mouths wide open, they employ the remarkable process of cross-flow filtration, effortlessly engulfing small organisms and plants.

The MMF’s 2022 research report reveals that there are 222 resident whale sharks on Mafia Island, accounting for 1.3% of the world’s total population of 17,600. These numbers show promise, with a significant increase from the initial count of 100 when the WWF began recording the presence of these majestic animals on the island in 2006.

The recognition of these humongous fish and their documented presence has brought about economic opportunities for the local community, diversifying the island’s primarily fishing-based economy. Despite occasional conflicts between the whale sharks and fishermen, who often seek small anchovies and mackerel, mistaken for the Lucifer shrimps that these gentle giants feed on, there are no major threats to the whale sharks in Mafia Island.

Thanks to the marine park reserve, these magnificent creatures are closely protected and monitored. The Marine Mega Fauna Foundation plays an active role in researching and educating the local community about conservation efforts, ensuring the long-term preservation of these incredible creatures.

Here are some few fascinating facts about whale sharks:

  • They are born at a size of 40-65 centimeters and can grow up to an astonishing 22 meters, weighing around 20 tons or more.
  • Whale sharks reach maturity at around 30 years of age and can live up to 70 years.
  • These awe-inspiring creatures are commonly found in tropical waters.
  • Despite their massive size, they are neither whales nor sharks. They lack proper teeth and are known for their calm and sociable nature.
  • Contrary to their imposing appearance, whale sharks are not predators and exhibit no violent behavior.

For further information about these mesmerizing creatures, visit the Marine Mega Fauna Foundation’s website at: https://marinemegafauna.org/whale-sharks/mafia-island-tanzania-research-project

Prepare to be enchanted by the wonders of Mafia Island and the extraordinary presence of the gentle giants that call it home.