The ocean sunfish, a creature that can weigh up to two tonnes and is covered in parasites, including its eyeballs, may not fit the typical image of a fish. In a special feature called “The Nature of Things 101,” Sarika Cullis-Suzuki explores the unique characteristics of this fish, describing its circular body, lack of a tail, and massive fins.
Utilizing a life-size model, Cullis-Suzuki showcases to co-host Anthony Morgan what sets the Mola mola, a type of ocean sunfish and one of the largest fish in the sea, apart from others.
Known for their ability to travel long distances and dive hundreds of meters deep multiple times a day in search of food, these fish are susceptible to parasites due to their slow movement, large surface area, and navigation through various water zones.
A staggering 73 different parasite species have been found on the Mola mola and other ocean sunfish types, some even carrying parasites on them. To combat these parasites, sunfish engage in breaching behavior, jumping out of the water and slamming back down, possibly to dislodge the parasites. They also allow smaller fish and birds to feed on the parasites.
Despite the existing knowledge about ocean sunfish, there is still much more to uncover about this species, as emphasized by Cullis-Suzuki. For those interested, “The Nature of Things 101” can be viewed on CBC Gem and The Nature of Things YouTube channel.