The Fried Egg Jellyfish, scientifically known as Cotylorhiza tuberculata, is a fascinating species commonly found in the Mediterranean, Aegean, and Adriatic Seas. Gozo’s clear waters provide an ideal environment for these jellyfish, especially during their blooming season in September. Known for their unique appearance, they are a remarkable sight for divers exploring the underwater realms of Gozo.
Identifying a Fried Egg Jellyfish is easy due to its distinct appearance. These jellyfish have a smooth, elevated dome that resembles a fried egg, surrounded by a gutter-like ring. They typically measure around 35 cm in diameter but can grow up to 50 cm. The jellyfish’s marginal lappets are elongated and sub-rectangular, with bifurcated mouth-arms branching into several short, club-shaped appendages with disk-like ends.
Cotylorhiza tuberculata primarily feeds on zooplankton and reproduces asexually. The larvae attach to hard surfaces and grow into polyp colonies, resembling a stack of saucers. Tiny baby jellyfish are released from these colonies and drift away. Despite their alien-like appearance, their touch is relatively harmless to humans and juvenile mackerel, which find refuge within the jellyfish’s mass.
Fried Egg Jellyfish are typically found in warm, shallow waters, often forming large aggregations or blooms. They drift with the planktonic currents, feeding on small zooplankton. Their populations can explode under favorable environmental conditions, creating stunning swarms. These blooms are most common in September around Gozo, offering a spectacular underwater display for divers.
An interesting fact about the Fried Egg Jellyfish is that it provides a safe haven for juvenile mackerel. These young fish dart in and out of the jellyfish’s mass, protected from predators. Additionally, the jellyfish’s stings are not harmful to humans, making them one of the more approachable jellyfish species for swimmers and divers.
Encountering Fried Egg Jellyfish while diving in Gozo, particularly during their bloom season, is an awe-inspiring experience. Reqqa Point, located on the north coast of Gozo, is an excellent location to observe these jellyfish at depths of approximately 5 meters. Divers can marvel at the surreal sight of these graceful creatures drifting gently through the water, creating an unforgettable and mesmerizing underwater adventure. However, it’s essential for divers to exercise caution and respect the jellyfish’s space to avoid accidental contact and potential stings.
