sea food

Q: Regarding the creatures of the ocean, kingklip is a species of cusk eel which lack scales. What is the shariah view on the permissibility of such? Furthermore, if not halaal, what about contamination and eating at an outlet that cooks/serves kingklip?

Q: In Saudi Arabia, almost all types of sea-foods are available and used. What is the Shar'ee ruling with regards to different sea-foods, especially prawns, shrimps, oysters, squids, snails, crabs, etc. according to the hanafi madhab?