The ocean sunfish, a creature weighing up to two tonnes and covered in parasites, is explored in depth by Sarika Cullis-Suzuki in a new episode of The Nature of Things 101. Cullis-Suzuki highlights the unique features of the Mola mola, one of the largest fish in the sea, including its circular body, lack of a tail, and massive fins.

These fish are known for traveling long distances, diving hundreds of meters multiple times a day in search of food. Due to their slow movement, large surface area, and movement through various water zones, they are susceptible to parasites infesting their skin, gills, fins, eyeballs, mouth, and intestine.

Researchers have identified 73 different parasite species on the Mola mola and other ocean sunfish types, some even hosting parasites of their own. The sunfish employ tactics like breaching out of the water and allowing smaller fish and birds to feed on the parasites to rid themselves of these unwanted hitchhikers.

Despite the existing knowledge about ocean sunfish, Cullis-Suzuki emphasizes the need for further research on this intriguing species. The Nature of Things 101 can be viewed on CBC Gem and The Nature of Things YouTube channel for more insights into these fascinating creatures.