くろあたまうみへびじゃないです
黒頭海蛇じゃないです
kuroatamaumihebijanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of くろがしらうみへび

1. It's not a black-headed sea snake.

Negative
Polite
Casual Register
Usually Written in Kana