The frog
Among the signs upon Pharaoh's people were the frogs, coming upon them in their vessels and food until they wearied of them; the Shafi'is forbid killing it and a prohibition from the Prophet ﷺ is reported.
In the Qur'an · 1
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فَأَرْسَلْنَا عَلَيْهِمُ ٱلطُّوفَانَ وَٱلْجَرَادَ وَٱلْقُمَّلَ وَٱلضَّفَادِعَ وَٱلدَّمَ ءَايَـٰتٍ مُّفَصَّلَـٰتٍ فَٱسْتَكْبَرُوا۟ وَكَانُوا۟ قَوْمًا مُّجْرِمِينَ
So We sent against them the flood and the locusts and the vermin and the frogs and the blood - a succession of clear signs. But they were arrogant and became a guilty folk.