Jaws - Senses

His flat dis-eyes were as black as the night. They were entirely without pupils but strangely knowing. Though they were as useless after dark as they eyes of any other fish, he had no need for them.
For, day or night, he was exactly attuned to his surroundings He knew within centimeters how far it was to the rusting hood of an ancient car half buried in the mud, and where a sunken dory lay. He sensed a moray slithering from its cave a thousand yards away, and lobsters stirring in the co-op's lobster pots.
All this he knew from receptors refined from three hundred millio years of evolution. Though his kind had diminished in size - his ancestor, Megalodon, had jaws wide enough to swallow a modern cow - its senses had only improved.

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Jaws: The Revenge, Part 1, Chapter 1