Signese

Was this in Hong Kong?

This was my translation:

不得擅自餵魚，違者必究。

Feeding the fishing without permission is not allowed, violators will be investigated.

請勿擅自放生

Please do not release animals here

先知會管理處消毒處理，謝謝！

First notify the managing office so they can handle sterilization, Thank you!

翠濤閣管理處

Greenview Court Managing Office

I guessed the words you didn't know were:

放生 and 違者必究

1 out of 2, eh