Well, sound is essentially a vibration. Eardrums are sensitive to such
vibrations in air, or even in water or solids. When you are underwater you
can hear a power boat a half mile away by the vibrations it sends through
the water. Mollusks don't have ears or eardrums, but they can detect
vibrations in the water or in the substrate. have you ever walked on a hard
packed sand beach and seen spurts of water coming out of the sand twenty
feet ahead of you, as clams rapidly withdraw their siphons in response to
the vibrations of your footsteps?  In the same way, snakes don't have any
external ear openings, but can "hear" your footsteps by the vibrations they
cause in the ground. So I guess the answer to your question depends on just
how precisely you want to define "hear".





----- Original Message -----
From: <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, October 31, 2003 11:47 PM
Subject: Question Man


> Dear All;-
>    Well the question is simple. We know that some mollusks can "see". Can
any mollusks "hear"?
>     Q-Man
>
>
> PLEASE NOTE: My new, long-term, and correct email address is:
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