Chironex yamaguchii

From Openwaterpedia

noun - Chironex yamaguchii, commonly known as habu-kurage in Japanese, is a highly venomous species of box jellyfish found in coastal waters around Japan, on Okinawa and the Ryukyu Islands, and in the Philippines. It is more closely related to Chironex fleckeri.

Its stings cause great pain and have caused several deaths in Japanese waters. The symptoms include cardiac arrest and respiratory failure with acute pulmonary oedema.

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