texts: Jesus, don't quibble with me.  I want to know if a Great White Shark did this. </s> <s> Probably. </s> <s> That's it?  Probably?  Look, sharks are attracted by blood, and thrashing around.... </s> <s> And sound. </s> <s> Sound?
labels: Sound.  Like sonar, or radar. They home in on irregular sounds, unusual sounds, any rhythmic low- frequency vibration.