Sea snakes (Serpentes: subfamilies Hydrophiinae and Laticaudinae) in Vietnam: a comprehensive checklist and an updated identification key Author Rasmussen, Arne Redsted Author Elmberg, Johan Author Gravlund, Peter Author Ineich, Ivan text Zootaxa 2011 2894 1 20 journal article 46820 10.5281/zenodo.277666 479010ae-6e99-4cc9-b4d3-b39ccc814f9a 1175-5326 277666 Emydocephalus Krefft Emydocephalus annulatus Krefft : ( Dotsenko, 1999 ; Rasmussen & Ineich, 2010 ). Diagnostic characters: Three supralabials, the second very long. Large ventrals, each three or more times as broad as the adjacent body scales. Scale rows around neck 15; scale rows around body 17, rarely 15; ventrals 125– 146. Only rudimentary maxillary teeth behind fangs. Colouration: Highly variable, body ranging from uniform black or brown to yellow, with or without bands. Size: 103 cm . General distribution : Vietnam , Philippines and the Australian region ( David & Ineich, 1999 ; Dotsenko, 1999 ; Alcala et al. , 2000 ; Rasmussen & Ineich, 2010 ). Remarks: Feeds only on fish eggs ( McCarthy, 1987 ).