The ocean sunfish, also known as the Mola mola, may not fit the typical image of a fish due to its massive size of up to two tonnes and its peculiar features, including being covered in parasites, even on its eyeballs. In a recent episode of The Nature of Things 101, Sarika Cullis-Suzuki delves into the fascinating world of this peculiar fish, highlighting its unique characteristics.
Cullis-Suzuki showcases the distinctive traits of the Mola mola using a life-size model, emphasizing its circular body, lack of a tail, and oversized fins. Despite its unusual appearance, the ocean sunfish is one of the largest fish in the sea and often travels long distances, diving hundreds of meters deep multiple times a day in search of food. However, its slow movement, large surface area, and passage through various water zones make it a magnet for parasites.
The Mola mola hosts a staggering array of parasites, with researchers identifying 73 different species infesting these fish. Some parasites even carry their own parasites. To combat this infestation, the sunfish employs unique tactics such as breaching – leaping out of the water and crashing back down, potentially to dislodge parasites. Additionally, they allow smaller fish and birds to feed on the parasites as a form of cleaning.
Despite our growing understanding of the ocean sunfish, there is still much to uncover about this enigmatic species. Cullis-Suzuki emphasizes the need for further research to unravel the mysteries surrounding the Mola mola. To explore more about this fascinating fish, viewers can watch The Nature of Things 101 on CBC Gem or visit The Nature of Things YouTube channel.