Although found worldwide, the shark was thought to keep to coastlines, hunting seals and sea lions and never straying far from its home territory.
Kuigi mõrtsukhaisid elab kõikjal maailmas, arvati, et ta hoiab rannikute lähedale, peab jahti hüljestele, sukelnorsudele ja merilõvidele ega lähe oma koduterritooriumist kaugele.