おにだるまだったら
鬼達磨鰧だったら
onidaruma dattara

Noun
Da Copula

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

1. If/when the onidharma-cod were…; If/when onidharma-cod existed…

Tara Conditional
Usually Written in Kana