えらぶうみへびであれば
永良部海蛇であれば
erabu umihebideareba

Noun
Da Copula

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

1. If/when Nagarebushi sea serpent; If it were a Nagarebushi sea serpent

Ba Conditional
Usually Written in Kana