The ocean sunfish, a creature that can weigh up to two tonnes and is covered in parasites, including on its eyeballs, may not fit the typical image of a fish. In a recent episode of “The Nature of Things 101,” host Sarika Cullis-Suzuki delves into the unique characteristics of what could be considered the world’s oddest fish.
Describing the Mola mola, a type of ocean sunfish and one of the largest fish in the sea, Cullis-Suzuki highlights its unconventional features such as a large circular body, lack of a tail, and massive fins. Using a life-size model, she showcases to co-host Anthony Morgan the reasons why this fish is often overlooked.
Known for their long-distance travels, ocean sunfish swim deep in the water, covering hundreds of meters multiple times a day in search of food. However, their slow movement, large surface area, and passage through various water zones make them susceptible to parasites.
Cullis-Suzuki explains the extensive presence of parasites on the Mola mola, including on the skin, gills, fins, eyeballs, mouth, and intestine, totaling 73 different species. Some parasites even have their own parasites. To combat this infestation, sunfish breach the water, jumping and slamming back down, a behavior believed to help rid them of parasites. Additionally, they allow smaller fish and birds to feed on the parasites.
Despite the existing knowledge about ocean sunfish, much remains to be explored about this species. Cullis-Suzuki emphasizes the need for further research to unravel the mysteries surrounding these fascinating creatures.
For those interested, “The Nature of Things 101” can be watched on CBC Gem or on “The Nature of Things” YouTube channel.