White Spotted Sea Jelly

Mastigias papua

Sporting a round, speckled bell and eight oral arms that end in large, club-like appendages, White Spotted Sea Jellies are a distinct species that live in bays, lakes and lagoons.

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Animal Type

Cnidarian

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Range

Indo-West Pacific

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Natural Habitat

Coastal Waters

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Diet

Plankton

Conservation Status

Not Evaluated
  • NE
    Not Evaluated
  • DD
    Data Deficient
  • LC
    Least Concern
  • NT
    Near Threatened
  • VU
    Vulnerable
  • EN
    Endangered
  • CR
    Critically Endangered
  • EW
    Extinct in the Wild
  • EX
    Extinct
Extinct
NE
Not Evaluated

Species yet to be assessed

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Characteristics

Most sea jellies use venomous stinging tentacles lined with toxin-injecting cells called cnidocytes to catch their prey. But White Spotted Sea Jellies are different in their lack of such tentacles. Instead, they release a mucus containing stinging cell clusters into the water, which can help stun their prey or offer protection against predators.

Feeding behaviour

White Spotted Sea Jellies feed differently from many sea jellies. Unlike most species that have a single mouth under the bell, White Spotted Sea Jellies have many small mouth openings along their oral arms. These openings help them catch plankton from the surrounding water, providing around 30% of their nutritional needs.

Threats faced/Conservation

This species is vulnerable to changes in the environment, which can lead to population declines. Climate change and extreme weather events, such as El Niño, can raise temperatures and salinity in the lagoons they live in—conditions that may be harmful to their survival.