おにだるまであれば
鬼達磨鰧であれば
onidaruma deareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of おにだるまおこぜ

1. If the onidharma were a hamo:; If it were a hamo (a type of fish)

Ba Conditional
Usually Written in Kana