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Re: NY times article

>Myhrvold and Currie ... agreed with the paleontologists who now
>reject the idea that the sauropods regularly used their tails defensively. The 
>animals >would probably have sustained as much
injury to their tails as they inflicted on >attackers.

1.  Don't other animals (like Alligators) use their tails defensively?  What 
are the reasons paleontologist reject defensive use
of tails by sauropods?

2.  Isn't there a type of crustacean (a shrimp I think) that snaps it claw and 
disables nearby fish with the sound or shock
wave?  Can anybody elaborate on this?