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... Answer updated 3 years ago

All sea creatures are Taahir whether consuming them is allowed like scaled fish and prawns, or not allowed like sea shells , crabs, oysters, etc. There is no sea or river creature which is  Najis.