| Compass Jellyfish (Chrysaora hysoscella (Linnaeus, 1766)) |
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Scientific name: Chrysaora hysoscella (Linnaeus, 1766) Common name: Compass Jellyfish Other names: Red-banded Jellyfish, Sea Nettle. French name: Méduse rayonnée, Chrysaore lesueur, Acalèphe rayonnée, Méduse boussole. Phylum: Cnidaria Subphylum: Class: Scyphozoa Subclass: Discomedusae Order: Semaeostomeae Family: Pelagiidae Size: Diameter of 30 cm, the tentacles can reach 2 meters long. Habitat: Sea, coastal surface water. Food: Large size planktonic animals and fish larvae. Reproduction: The Compass Jellyfishes are hermaphrodites, they first function as males and then become females. Larvae are released by females in summer or autumn and quickly attach as polyps. On the following spring, each polyp releases a tiny jellyfish which becomes an adult in summer and will live during about one year. Geographic area: Baltic sea, North sea , English Channel, Atlantic ocean and Mediterranean sea. |
The Compass Jellyfish is a rather large and flat jellyfish. You can tell it apart with the 16 brown V-shaped radial marks on a beige ground colour. They draw the shape of a compass rose. The bell's rim bear 32 small brown rounded lobes and 24 very long tentacles. The underside of the bell has 4 frilly oral arms which are 20 to 60cm long. |
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I will first content of jellyfishes lying on the beach. I have found, on the Internet, very beautiful underwater pictures of the Compass Jellyfish. Will I be courageous enough, one day, to practise underwater photography? |
André Bon November 2010