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Yesterday, May 11th, we added to our display of Mediterranean jellyfish a compass jellyfish (Chrysaora hysoscella) found during a field trip in the port of Bunarina on Verudela in Pula, at a depth of about half a meter. This adult specimen has a cap width of about 15 cm and a tentacle length of about 80 cm, and is considered sexually mature.
Over the past month, this species has been recorded several times along the western coast of Istria. It can most often be seen along the coast and near the sea surface during spring and early summer, when adult, sexually mature individuals appear.
It is recognizable by its yellow-brown cap with markings in the shape of the letter "V", which resemble a compass, from which it got its name. The cap can grow up to 50 cm, and from it extend 24 tentacles arranged in eight groups, which can reach a length of up to 1.5 meters. The tentacles have stinging cells that can cause painful skin burns in humans.
It is interesting that in our jellyfish breeding unit we also have polyps, that is the asexual form of this species, which we will dedicate ourselves to growing in the near future.
