The ocean sunfish, a creature that can weigh up to two tonnes and is covered in parasites, is explored in depth on The Nature of Things 101 by host Sarika Cullis-Suzuki. Described as the world’s weirdest fish, this species defies conventional fish characteristics with its large circular body, lack of a tail, and massive fins.
Cullis-Suzuki showcases the unique features of the Mola mola, an ocean sunfish species that ranks among the largest fish in the sea, using a life-size model. These fish are remarkable for their ability to travel long distances, diving hundreds of meters deep multiple times daily in search of food. However, their slow movement, large surface area, and passage through various water zones make them vulnerable to parasites.
The ocean sunfish is teeming with parasites, found on the skin, gills, fins, eyeballs, mouth, and intestines. Scientists have identified 73 different parasite species on the Mola mola and other ocean sunfish varieties, some with parasites of their own. To combat these parasites, sunfish breach out of the water, potentially to dislodge the unwelcome guests. They also allow smaller fish and birds to feed on the parasites as another defense mechanism.
Despite the existing knowledge about the ocean sunfish, there is still much to uncover about this fascinating species, emphasizing the need for further research. Cullis-Suzuki emphasizes the ongoing exploration required to truly understand these peculiar creatures.
For more insights, viewers can tune in to The Nature of Things 101 on CBC Gem or visit The Nature of Things YouTube channel.
