Question:                                                                                                                     

As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Is it permissible to consume oysters?

Answer:

In the Name of Allah, the Most Gracious, the Most Merciful.

As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.

From the creatures of the sea, only fish is Halal. Any other seafood besides fish is impermissible for consumption.[1]

Oysters are not fish. Hence it is not permissible to consume oysters.

For further details on the ruling of seafood, kindly refer to the following link:

http://masjidyaseen.org/ruling-of-shrimp-crab-and-lobster/

And Allah Ta’āla Knows Best

(Mufti) Abdul Azeem bin Abdur Rahman

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The Shar’a ruling herein given is based specifically on the question posed and should be read in conjunction with the question.

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[1]  (وَلَا) يَحِلُّ (حَيَوَانٌ مَائِيٌّ إلَّا السَّمَكُ) (الدر المختار مع رد المحتار، ج 6، ص 306، سعيد)

فتاوى رحيمية، ج 10، ص 77، دار الإشاعت