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Old 28-06-2016, 13:32   #1
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What's that crackling sound I hear at night under the boat?

Some nights it's louder than others. It's hard to describe, but it's like a crackling or pebbles moving along the sea bed?



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Old 28-06-2016, 13:37   #2
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Re: What's that crackling sound I hear at night under the boat?

pistol shrimp, check the youtube video.
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Old 28-06-2016, 13:38   #3
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Re: What's that crackling sound I hear at night under the boat?

I remember a couple years back a lady was complaining about noise heard through the hull of her ship. She found out from some locals it was Pistol Shrimp -
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Old 28-06-2016, 14:00   #4
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Re: What's that crackling sound I hear at night under the boat?

Wow that is impressive. They are making a real racket tonight. Thanks for letting me know.

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Old 28-06-2016, 14:30   #5
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Re: What's that crackling sound I hear at night under the boat?

Friend bought a steel boat and was in near panic as he was sure it was bubbles from electrolysis


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Old 28-06-2016, 14:42   #6
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Re: What's that crackling sound I hear at night under the boat?

Shrimp/prawns.

Simple way to scare them off is to drop the BBQ into the water...
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Old 28-06-2016, 14:48   #7
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Re: What's that crackling sound I hear at night under the boat?

Don't believe the shrimp thing. Polyestermites are chewing through your hull.
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Old 28-06-2016, 22:02   #8
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Re: What's that crackling sound I hear at night under the boat?

Lol.

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Old 28-06-2016, 22:51   #9
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Re: What's that crackling sound I hear at night under the boat?

As mentioned, shrimp. Sometimes they are very loud, last year I swear they were on the hull, could have been since we had a bit of slime on it at the time, I think they were eating it.

As a diver, we hear shrimp making noises most dives. Jacques Cousteau called his first book and movie Silent World, a totally wrong name for anything underwater.
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Old 28-06-2016, 23:11   #10
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Re: What's that crackling sound I hear at night under the boat?

Radiolab recently made a wonderfully produced podcast about these little creatures. When you learn the whole story about them, it will blow your mind. Do yourself a favor and give it a listen. http://www.radiolab.org/story/bigger-bacon/

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Old 29-06-2016, 06:39   #11
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Re: What's that crackling sound I hear at night under the boat?

The first time we encountered this was at Miami Beach Marina in the 90's. We thought we had an electrical issue on the boat. It was mussels on the pilings. This is very common in some marinas. Good luck and safe sailing. P.S. They did, however, seem to have a decidedly Cuban rhythm.
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Old 29-06-2016, 07:12   #12
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Re: What's that crackling sound I hear at night under the boat?

When we were anchored in Hervey Bay, Qld which the humpbacks use as a nursery, our first night the dog was constantly running up on deck to bark as the noise of the whales singing was so loud through the hull.
He EVENTUALLY went to bed but wasn't a happy puppy.
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Old 29-06-2016, 07:44   #13
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Re: What's that crackling sound I hear at night under the boat?

Quote:
Originally Posted by gdavids View Post
Radiolab recently made a wonderfully produced podcast about these little creatures. When you learn the whole story about them, it will blow your mind. Do yourself a favor and give it a listen. http://www.radiolab.org/story/bigger-bacon/

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Thanks for the link. We have heard these many times in our travels, and after the initial freak out we looked them up but the Radio Lab story is fascinating.


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Old 29-06-2016, 08:07   #14
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Re: What's that crackling sound I hear at night under the boat?

Small fish. I have it alot. In shallow water. Ionian, Greece
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Old 29-06-2016, 08:11   #15
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Re: What's that crackling sound I hear at night under the boat?

Croakers chewing on the growth of your keel.
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