He knew that each of the jerking bumps of the shark... ... had been meat torn away... ... and that the fish now made a trail of blood for all sharks... ... as wide as a highway through the sea.
[オオワニザメか, oowanizame ka] (n) Odontaspididae (family of four species in two genera of lamniform sand sharks, also known as sand tiger sharks or ragged tooth sharks)
[カグラザメか, kagurazame ka] (n) Hexanchidae (family with 4 species and 3 genera of cow sharks characterized by either 1 or 2 additional pairs of gill slits)