Emydocephalus ijimae

Emydocephalus ijimae, also called Ijima's sea snake and Ijima's turtleheaded sea snake, is a species of snake in the family Elapidae. The species is endemic to East Asia. "E. ijimae" feeds exclusively on the eggs of coral reef fishes, which makes them an important predator for maintaining a healthy coral reef ecosystem.
Etymology.
The specific name, "ijimae", is in honor of Japanese zoologist Isao Ijima (1861–1921).
Geographic range.
"E. ijimae" is found on the coasts of China, Japan (including the Ryukyu Islands), and Taiwan.
Sex & Growth.
"E. ijimae" exhibit sexual size dimorphism with males reaching a snout-vent length (SVL) typically less than 750 mm and females sometimes exceeding 800 mm. Females also have a larger body weight ranging from 170 to 600 g compared to the male that weighs in at 70 to 350 g. The female BW also experiences greater fluctuations than males. Adult males typically see an increase in BW from early spring to late summer and females occasionally undergo a rapid BW decrease from late autumn to early spring followed by a steady weight regain.
SVL in newborn "E. ilijmae" is between 266 mm and 342 mm. Neonate males have been reported to grow 0.27 mm/day while neonate females grow 0.36 mm/day. The snakes reach maturity around the same age. Between 19-28 months for males and 19-26 months for females. 
Reproduction.
"E. ijimae" is viviparous. Neonates begin reproductive activity in the second or third summer and third spring after birth. Studies have suggested that "E. ijimae" are income breeders that rely on temporal energy intake to produce offspring. 