るりすずめだいでしょう
瑠璃雀鯛でしょう
rurisuzumedaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of るりすずめだい

1. Probably a ruby red cardinalfish.

Polite
Presumptive
Conjecture
Usually Written in Kana