くろあたまうみへびでしょう
黒頭海蛇でしょう
kuroatamaumihebideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of くろがしらうみへび

1. Probably a black-headed sea snake.

Polite
Presumptive
Conjecture
Usually Written in Kana