Question Summary:
In Islam Is it prohibited or not recommended to eat fish and egg together; fruits and milk together; shrimps, prawns and crabs?

Question Detail:

In Islam Is it prohibited or not recommended to eat fish and egg together; fruits and milk together; shrimps, prawns and crabs?

 

Answer :

In the name of Allah, Most Gracious, Most Merciful
Assalaamu `alaykum waRahmatullahi Wabarakatoh
1. 
Shariah has not discussed the issue of eating fish together with eggs or fruits together with milk.  It will be permissible to eat them together as there is not Shar’ee prohibition.  If a doctor or hakeem states that is it harmful to combine the two and one trusts his opinion, then they should refrains from combining the two.
2.
According to the Hanafi Madhhab, only fish is permissible to consume from sea food animals.  There is a difference of opinion amongst the Hanafi Jurists whether shrimps/prawns falls under fish.  Those who say it is a fish state it will be permissible to consume.  Those who are of the view that prawns/shrimps are not fish say it is impermissible to consume.  It is better to adopt precaution and avoid eating it.  Consider the following hadith:
دع ما يريبك إلى ما لا يريبك
Leave that which is doubtful for which is not doubtful. (Al-Tirmidhi & Al-Nasa’i)
Crabs are not lawful to consume.
Fatawa Mehmoodia (18/212&267) Jamia Farooqiya
And Allah knows best
Wassalam
Ml. Ehzaz Ajmeri,
Student Darul Iftaa
Concurred by:
Ml. Abu Yahya
Student Darul Iftaa
Darul Iftaa, Madrassah In'aamiyyah