Sometimes during world war II, it was told that the Snapping shrimp was once studied as the sounds interfered with the detection of hostile submarines.
The snapping sound came from a high-speed jet of water shoots out of the socket due to extremely rapid compression as the ‘finger’ plunges into the socket. Snapping shrimp has pincer with a moveable ‘finger’ held at right angles to a matching ‘socket’ on the opposite side. When the ‘finger’ is released, it plunges rapidly into the socket which result an explosive sound. It’s amazing how such a small critter did really interfered with its sound.
But I don’t think this particular one would make so much noise. This one special Crinoid snapping shrimp is expecting. With tummy full of eggs moving heavily making a way out.
In the other side, one did not hesitate taking a fast and steady walk to a destination.
And to some, stay still and quite are just what needed.