Life of Cannonball Jellyfish

Life of Sea | Cannonball Jellyfish (Stomolophus meleagris) Cannonball jellyfish is also known as the Cabbage head jellyfish or Jelly Balls. Its common name is derived from the resemblance to a cannon ball in shape and size.  Cannonball jellyfish are found in estuarine and salt water.  Cannonball jellyfish were reported from New England to Brazil in the western Atlantic, from southern California to Ecuador in the eastern Pacific Ocean, the Sea of ​​Japan to the South China Sea in the western Pacific. They are one of the most common scyphomedusae along the southeastern and Gulf coasts of the United States.

Scientific classification
Kingdom:     Animalia
Phylum:     Cnidaria
Class:     Scyphozoa
Order:     Rhizostomae
Family:     Stomolophidae
Genus:     Stomolophus
Species:     S. meleagris

Cannonball jellyfish can have milky brown to yellow in color and looks like a large half-egg shaped mushroom. It differs from most other jellyfish by having a more muscular body and the fact that it was a good swimmer. Hemisperical the bell reaches 20 to 25 cm (8 to 10 inches) wide and lined with brown pigment. He has short, excellent oral arms with secondary mouth folds (scapulets) at the base of the bell is covered with mucus to catch small prey. Stomolophus meleagris meaning "many mouths hunter". The slime is also considered a response to the disruption rather than breast feeding.

Cannonball jellyfish feed on plankton, such as veligers, and all kinds of red drum larvae. They have a symbiotic relationship with the regular spider crab, which also eat small zooplankton. The crab feeds on the prey captured by the cannonball and the medusae of the jellyfish. Cannon balls are an important food source for leatherbacks, so preserving the  Cannonball jellyfish is important for the survival of the leatherback turtles.  Cannonball jellyfish are commercially harvested as food for humans.

These jellyfish are quite interesting to watch, looking somewhat like a mushroom floating in the water. There are even some people who jellyfish in their own fish tanks at home and keep them as pets or office pets. But, when disturbed the Cannonball jellyfish secretes a mucus from his nematocyst contains a toxin. The toxin damages small fish in the vicinity, and drives away most predators, except for certain species of crabs. Although not often Cannonball jellyfish stabbing people, it still has toxins that can cause cardiac problems in animals and humans. The toxin causes an irregular heart rhythm problems in the myocardium and conduction pathways. Such complications are also associated with other toxins of coelenterates. The toxin is also harmful to the eyes when the nematocyst into contact with the eyes is very painful and is followed by redness and swelling.

There are beings who prey on the  Cannonball jellyfish. One of these creatures is the endangered Leatherback turtle bark that feed on the  Cannonball jellyfish from April to early summer when migrating from the Caribbean to the north head. Another predator of the Cannonball jellyfish is human. We commercial harvesting of these jellyfish as a food source in many restaurants, especially in the Asian region. It is the high nutritional and protein content of these jellyfish that makes it such a good source of food especially in the poorer areas where little protein availability in the diet is a common problem. The jellyfish is eaten as a delicacy in Japan and has also played an important role in traditional Asian medicines for thousands of years and continue to do so.

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1 komentar :

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