Did You Know: Pistol Shrimp

Did you know? — By Goran on 2011/08/01 4:05 AM

Did you know that pistol shrimp can produce the sound that can reach up to 218 decibels and that his cavitation bubble can reach temperatures of over 5,000 K (4,700 °C)?

This is pretty impressive for a little shrimp no longer than 1–2 inches (3–5 cm), isn’t it?

The snapping shrimp competes with much larger animals like the Sperm Whale and Beluga Whale for the title of  ”loudest animal in the sea”.

The shrimp snaps a specialized claw shut to create a cavitation bubble that generates acoustic pressures of up to 80 kPa at a distance of 4 cm from the claw.

As it extends out from the claw, the bubble reaches speeds of 60 miles per hour (97 km/h) and releases a sound reaching 218 decibels. This is even louder than a jet plane (120 db) and gun shot (140 db)!

The pressure is strong enough to kill small fish.

The snap can also produce sonoluminescence from the collapsing cavitation bubble. As it collapses, the cavitation bubble reaches temperatures of over 5,000 K (4,700 °C).

In comparison, the surface temperature of the sun is estimated to be around 5,800 K (5,500 °C).

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