Question Summary:
Is it permissible to consume prawns that have not yet been deveined?

Question Detail:

My question pertains to permissibility of eating prawns or shrimps. I know that it is halal in some schools and haram in others depending upon whether prawns are considered fish or not. My question is that in the schools that consider eating prawns halal, is it permissible to eat prawns that have not been deveined?
Prawns have 2 visible veins in their body, 1 running along the back and one along its belly. The one one al9ng the back is actually its digestive tract and is filled with partially digested food as well as feaces. The digestive tract can be removed (deveining) before cooking. However  if we eat a prawn in which the digestive tract has not been removed we would be consuming its feaces along with the flesh. Feaces is generally considered impure and haram. Would this also apply to prawn feaces? If so, then would it be permissible to eat a prawn whose digestive tract has not been removed before cooking?
 
Jazakallah for your advice.

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
The impurities in the digestive tract of a fish have to be removed in order for the fish to become permissible to consume. This is more essential in small fishes where generally the digestive tract is not cleaned. Accordingly, the same ruling will apply to prawns if consumed based on the opinion of those ‘Ulamā who regard prawns as a fish. Therefore, it will be necessary to remove the digestive tract (a dark dorsal vein) before consuming. [1]
And Allah Ta’āla Knows Best
AbdulMannan Nizami
Student Darul Iftaa
Chicago, IL, USA 
Checked and Approved by,
Mufti Ebrahim Desai.
www.daruliftaa.net