Are squid, octopus, crab, lobster, and mussels considered allowed in Islam? If not, what are the reasons behind their prohibition?

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Are squid, octopus, crab, lobster, and mussels considered allowed in Islam? If not, what are the reasons behind their prohibition?
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

Animals mentioned in your question and all animal of water are not allowed to eat except fish with scales and shrimps or prawns.

Every rule of Haraam is based on avoiding the humans eating or consuming very harmful items. Allah (SWT) Knows the harm which we might not know but we believe that all rules in Islam are based on serious reasons best known by Allah (SWT).

Wassalam.