''Morbakka fenneri'', also known as the Moreton Bay stinger or the fire jelly, is a small

box jellyfish Box jellyfish (class Cubozoa) are cnidarian invertebrates distinguished by their box-like (i.e., cube-shaped) body. Some species of box jellyfish produce potent venom delivered by contact with their tentacles. Stings from some species, including ' ...

found in the waters of

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

and

Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...

. It has a transparent bell shape with four mauve colored tentacles that are each 50cm long. It is hard to capture this jellyfish to study it due to its small size, fragility, toxicity, and similarity to other species of box jellyfish. The sting from this species results in symptoms similar to

Irukandji syndrome Irukandji syndrome is a condition that results from envenomation by certain box jellyfish. In rare instances the sting may result in cardiac arrest and death. The most common jellyfish involved is the '' Carukia barnesi'', a species of Irukand ...

. The wound is typically 10mm wide and is followed by an immediate burning sensation. If left untreated, it can become necrose, pruritic, and vesicule.

References

Animals described in 2008 Cnidarians of the Pacific Ocean Carukiidae {{Cubozoa-stub