The school instructor said that the occasional nurse shot might swim near The reef but it is not an aggressive species seeing a shark was impossible but he said not to panic if we do what does the term impoverable mean in this content

The term "impoverable" does not exist in the English language. It is likely a typographical error or misuse of a word. Therefore, it is impossible to determine its meaning in this particular context.

The term "impoverable" does not appear to have a specific meaning in the given context. It is possible that it is a typographical error or perhaps a misspelling. Without further information or clarification, it is difficult to determine its intended meaning.