Zaid Alsalami, Shaykh Dr Zaid Alsalami is an Iraqi born scholar, raised in Australia. He obtained a BA from Al-Mustafa University, Qom, and an MA from the Islamic College in London. He also obtained a PhD from... Answered 4 years ago
Bismihi ta'ala
As far as seafood is concerned, we are allowed to eat any fish that has/had scales, and prawns.
Any other sea creature is not allowed. Crayfish are crustaceans, and not exempted like prawns (shrimp), and therefore cannot be eaten.
And allah knows best.