ようこえがわいるかでしょう
揚子江河海豚でしょう
yōkoega wairukadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of ようすこうかわいるか

1. Probably a Yangtze finless porpoise.

Polite
Presumptive
Conjecture
Usually Written in Kana