Answered by Shaykh Faraz Rabbani
Why did Abu Hanifa (May Allah mercy on him) forbit all seafruits exept for fish and some others? In what book is his statement written?
Walaikum assalam wa rahmatullah,
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This is well-established in the works that transmit the opinions of Imam Abu Hanifa (Allah have mercy on him), like Imam Muhammad’s Dhahir al-Riwaya texts, and is relied-upon in the fatwa-references of the school.
And Allah alone gives success.
Faraz Rabbani