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Kingdom: Animalia
Phylum: Cnidaria
Class: Scyphozoa
Order: Rhizostomae
Family: Stomolophidae
Genus: Stomolophus
Species: S. meleagris
Common Names: Cannonball Jellyfish
Scientific name: Stomolophus Meleagris
Harmful to human: Yes, this jellyfish can secrete a mucus from its nematocyst. The mucus contains a toxin which can cause cardiac problems in animals and humans
Predators: Some species of crab, leatherback sea turtles
Maximum size: Its dome-shaped bell can reach 25 cm (10 inches)
Colour: Brown/tan
Feeding: zooplankton such as veligers and red drum larvae.
Photosynthetic: No
Habitat: Estuarian waters
Distribution: North America's eastern seaboard all the way to Brazil
Average water temperature: 23.1 °C (73.6 °F)
Average Salinity: 33.8 ppt (parts per thousand)
Other Notes: Cannonball jellyfish have a symbiotic relationship with the portly spider crab (Libinia emarginata), which also eats the small zooplankton. The crab feeds on the prey captured by the jellyfish.
