Fish that kill one another

Sa'd al-Jari said: I asked Sayyiduna Ibn Umar and Sayyiduna Ibn Amr (may Allah be pleased with them all) about fish that die from cold, or that other fish have killed. Both of them said: They are lawful.

Tawus used to consider a fish that another fish has killed disliked (makruh).

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: There is no harm in eating such a fish.

Abdullah bin Ubayd bin Umayr was asked: if a man casts his hook into the water to catch fish, and a fish gets caught on it, but another fish comes, attacks it and takes away half of it, what is the ruling? He said: He may eat the remaining part.