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Sea Snake Niue.jpg
Laticauda schystorhyncha in Niue
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Hydrophiidae
Genus: Laticauda
Species: L. schistorhynchus
Binomial name
Laticauda schistorhynchus
(Schneider, 1799)

The katuali or flat-tail sea snake (Laticauda schistorhynchus) is a sea snake, related to the sea krait, found only in the waters of the Pacific Island nation of Niue. It grows up to 1 metre in length, and is highly venomous, making it one of the most dangerous creatures on the planet. It has a fin-like tail, helping it to swim better.[2][3]