I was hurt. Still more of that wretched fish!But now I set myself to my task

with a will.

more of that指代哪個?

Still more of that wretched fish!

這是一個名詞詞組 Still more of that wretched fish = 還要繼續察看那條可憐的魚!

假如你結合課文上下文去閱讀的話,你就會了解怎么樣把這個名詞詞組擴充為一個完整的句子。I had to observe still more of that wretched fish!