Musannaf Ibn Abi Shaybah 20924 — Fish found floating dead

Abdullah bin Abi al-Hudhayl said: A man asked Sayyiduna Ibn Abbas (may Allah be pleased with them both): I come to the seashore and find many fish cast up there; what is the ruling on them? Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: Eat, as long as you do not see the fish floating dead on the surface.