あかしゅもくさめじゃありませんでした
赤撞木鮫じゃありませんでした
akashumo kusamejārimasendeshita

Noun
Desu Copula

The polite, past negative form of あかしゅもくざめ

1. Was not a red bumping-wood shark.; Was not a red shark that bumped into wood.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana