えらぶうみへびだったら
永良部海蛇だったら
erabu umihebidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of えらぶうみへび

1. If/When Nagasaki's sea serpent…; If it were a Nagasaki sea serpent…

Tara Conditional
Usually Written in Kana