Yahya related to me from Malik from Zayd ibn Aslam that Sad al-Jari, the mawla of Umar ibn al-Khattab asked Abdullah ibn Umar aboutfish which had killed each other or which had died from severe cold .He said, "There is no harm in eating them.'' Sad said,' 'I then askedAbdullah ibn Amr ibn al As and he said the same."
USC-MSA web (English) reference: Book 25, Hadith 10
Arabic reference: Book 25, Hadith 1062