Mughirah bin Abu Burdah, who was of the tribe of Banu ‘Abd-Dar, narrated that he heard Abu Hurairah say: “The Messenger of Allah (ﷺ) said: ‘The water of the sea is a means of purification and its dead meat is permissible.’”
It was narrated from Jabir bin ‘Abdullah that the Messenger of Allah (ﷺ) said: “Whatever the sea throws out or is left behind when the tide ebbs, eat it, but whatever rises to its surface, do not eat it.’”