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This species is invasive around the United States coasts. Invasive species can displace native animals by outcompeting them for prey.
  • Size

    Bell diameter of 1.6 feet (50 cm)
  • Diet

  • Range

    Indo-Pacific near Australia
  • Habitat

    Near coasts and in estuaries

Physical Characteristics

  • Coloration is translucent white to brownish with white spots on its large, gelatinous bell.
  • Eight, long fleshy oral arms, each with flaps of tissue.
  • Maximum bell diameter of 1.6 feet (50 cm).
  • Zooxanthellae may live in tissue, contributing to brownish color.

Animal Fact

A large group of jellies is called a smack

Diet / Feeding

  • Diet consists of zooplankton.
  • Feed by using oral arms to capture zooplankton by filter feeding.

Range / Habitat

  • Occurs in the Indo-Pacific near Australia (native). Populations introduced in Caribbean, Gulf of Mexico, California’s coast and Florida’s Indian River Lagoon. Populations also reported in Atlantic off the coast of Brazil.
  • Found near coasts and in estuaries.

Conservation Status

  • “Not evaluated” on the IUCN Red List.

Additional Information

  • Also known as the “Australian spotted jellyfish.”
  • Invasive species around the U.S. coasts. Jellies feed on the zooplankton that native species rely on, disrupting the ecosystem. Jellies also take a toll on shrimp fisheries by clogging nets and damaging fishing equipment.
  • Appear to be introduced in non-native areas through ships; polyps may survive in tanks of large ships.
  • Typically travel in large groups called smacks.


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