Scientists have identified a new species of highly venomous box jellyfish near Singapore after discovering that specimens collected several years ago had been incorrectly classified as another species.
The newly described species, Chironex blakangmati, was identified in specimens collected from Singapore beaches in 2020 and 2021. Researchers had initially classified the animals as Chironex yamaguchii, a box jellyfish species first discovered in Okinawa, Japan.
The discovery highlights how marine species can remain scientifically unrecognised even when they are found in areas that researchers have already studied. In this case, scientists revisited the identity of the specimens and determined that they belonged to a distinct species.
Box jellyfish are known for their cube-shaped bodies and tentacles equipped with venom-delivering cells. Some species can cause severe injuries, and their stings can be life-threatening. Correctly identifying different species is therefore important for understanding marine biodiversity and assessing potential risks to people who swim or work in coastal waters.
The identification of Chironex blakangmati also adds to scientific knowledge of box jellyfish in Southeast Asian waters. Distinguishing closely related species can help researchers better understand their distribution, biology and ecological roles.
The specimens’ original classification demonstrates the challenges involved in identifying marine animals that may share similar physical characteristics. Further research can help clarify how the newly described species differs from related jellyfish and establish more details about its presence in the region.
Although the discovery does not mean that the species has only recently appeared, it represents a new scientific identification. Beachgoers should avoid touching unfamiliar jellyfish and follow local beach warnings, particularly in areas where potentially dangerous marine animals may be present.

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