Answer
(Fatwa: 136=135/L)
Yes, it is correct that according to Ahnaf in sea animals only fish is allowed to eat and the rest are prohibited:
اما الذی یعیش في البحر فجمیع ما في البحر من الحیوان محرم الاکل الا السمک خاصة فانہ یحل اکلہ الا ما طفا منہ (بدائع الصنائع، 5/35، کتاب الذبائح والصیود)
Therefore, if calamari is not a fish then it will not be permissible to consume it. (for details, please see:والصیود بدائع الصنائع، اول کتاب الذبائح (
Every one of you (wife and husband) has to follow his imam; there is no need to look for daleel:
علی ان الواجب العمل بقول المجتھد و ان لم یظھر دلیلہ (شامی، 41/396)
So, you have to follow your imam and your wife has to follow her imam.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband