Answered by Shaykh Amjad Rasheed
Is it permissible to eat crab in our school? And what is the ruling regarding seafood?
Answer:
It is not permissible to eat crab in our school. As for aquatic animals – meaning those that cannot live outside of water – it is permissible to eat them whether they resemble normal fish or not, even if they resemble dogs or other impermissible terrestrial (i.e., land) animals. An exception is poisonous [m: animals]; these are impermissible whether they are terrestrial or aquatic.