Question:

There is a fish called “shark” which hunts, bites, rips and eat other fish. Sometimes they eat humans as well. How is it to eat a shark?

Answer: حامدا ومصليا ومسلما
Every type of fish is halal for consumption.

(وحل الجراد و انواع السمك بلا زكوة (تنوير الابصار 9:440 مطبوعه زكريا

And Allah Ta’ala knows best.
(Hazrat Mufti) Ahmed Khanpuri (May Allah preserve him)
Mahoodul Fatawa 5/665