Lobster

Lobsters comprise a family (Nephropidae, sometimes also Homaridae) of large marine crustaceans. Lobsters have long bodies with muscular tails, and live in crevices or burrows on the sea floor.

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Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 2 years ago

The reason of all rules of Islam is based on getting the benefit and avoiding the harm. Allah (SWT) knows the secrets and real effects , and He ordered us to avoid things which are Haraam, and we believe that He does not prevent us from any thing for no reason, but for His absolute wisdom, whether we know it or not.

Crab, lobster and other sea and water animals except prawns are Haraam. Simply because they ( except prawns) are harmful for our health and He knows the details of the harm. We do trust His absolute wisdom and never argue with Him. Scientific researches are improving day by day and providing more evidence that every Haraam in Islam is in fact harmful. We need to submit to the Will of Allah (SWT) with surety that all His orders to us are to protect us from harm and provide us with benefits.

Wassalam.

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Liyakatali Takim, Professor Liyakat Takim is the Sharjah Chair in Global Islam at McMaster University in Canada. Answer imported 3 years ago

As far as sea food is concerned, only that fish which has scales may be consumed. In addition, it must be alive when caught from the water. Crabs are not classified as fish and may not be consumed. There is some differences amongst certain ulama' regarding lobsters but the general consensus seems to be that it should not be consumed. See Ayatullah Seestani's Islamic Laws p. 489.