Not just a jellyfish retailer, we study and explore the beauty of those mysterious creatures.
Cassiopea sp. (Upside-down Jellyfish), filmed on slow motion.
A regular motion named "pulsing" was observed in this video. Stinging water is a common phenomenon that upside-down jellyfish made, in which it produce mucus in water namely "cassiosomes" which consists of an outer epithelial layer of nematocytes surrounding by endosymbiotic dinoflagellates hosted within amoebocytes and presumptive mesoglea. Those mucus are capable of killing prey and making discomfort to swimmers.
Close-up photo of flower-like oral arms of Cassiopea sp. jellyfish.
Cotylorhiza tuberculata (Mediterranean Jellyfish/Fried-egg Jellyfish)
Commonly found in the Mediterranean, Adriatic, and Aegean Seas. Yellowish-brown algae co-living in the center of the bell of jellyfish, with purple pigment at the tip of oral arms. Occasionally some tiny animals like crabs would hide inside the jellyfish's bell, or hitching on the top of the bell.
The stings of Mediterranean jellyfish have very little effect on human.
Aurelia aurita (Moon Jelly), filmed on slow motion.
This is a mature moon jelly with a diameter nearly 30cm. There are at less 12 type of moon jelles on the earth, with slightly different characters including the folding of oral arms, oral arm width, distal gastric diameter, bell shape, etc.
Rhopalium, indicated by yellow arrow.
Rhopalium are the main sensory structures of scyphozoan (true-jellyfish). Light-sensory structure (pit eye), and gravity-sensory structure (statoliths) were included inside a rhopalia.