The image depicts a dense cluster of jellyfish, which are known for their unique appearance and behavior. These marine creatures are typically found in tropical and temperate waters, where they can be seen swimming in large groups or schools. The jellyfish in this image appear to be of the species known as Aurelia aurita, which is commonly found in the Mediterranean Sea and the Red Sea. These jellyfish are known for their ability to produce a toxic substance that can cause severe skin irritation or even death if ingested by humans or other animals.