いとひきふえたいであれば
糸引笛鯛であれば
itohikifuetaideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of いとひきふえだい

1. If it were Itoyodai (threadfin bream); If it is Itoyodai (threadfin bream)

Ba Conditional
Usually Written in Kana