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Old 26-03-2010, 20:15   #1
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Weird Noises in the Water...

Ok, I didn't know where to put this. We are currently anchored at Jack Point at Gasparilla Island and we have been hearing the strangest sounds. It sounds like a diesel motor that is pinging really bad. It gets loud and then goes quiet. Yes I looked. There is not a boat for a long way off. We are about 200 yards off the shoreline toward the middle of the anchorage. My wife seems to think that it is electricity in the water but I'm not convinced that is what it is. I would love to hear what some of you may have to say about it. I know we will only be here for one night... lol Not so sure I will be able to sleep. I keep thinking I'm gonna get hit by a tug boat... LOL
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Old 26-03-2010, 20:19   #2
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It's snapping shrimp. See here: Alpheidae - Wikipedia, the free encyclopedia They sound like popping right up against the hull...like the water is electrified...
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Old 26-03-2010, 20:24   #3
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Occam Razor would say it is a "diesel motor that is pining really bad". Sound travels a long long way underwater. In Mexico we heard shrimpers, which are pulling at full power, far over the horizon. Perhaps 10 miles. But bugs and mammals make noise too. It's not electricity, but I'm not going up against wife-science.
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Old 26-03-2010, 20:40   #4
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Ok, I looked into the shrimp theory. While those are really cool and loud. I'm not convinced that they are the culprit. While a long off diesel in Charlotte Harbor could be more like the guilty party. When we were anchored in the Florida Canal (you know, the one they almost killed the water system with....) we thought that rocks were bouncing off our hull due to a really fast current. In fact we do believe that the Shrimp in question were the culprit. I think I will just turn up the stereo for a bit.
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Old 26-03-2010, 20:53   #5
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Here's a thread you might enjoy reading, atraitees: Weird Sounds from Below
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Old 26-03-2010, 23:28   #6
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I always love the sounds when I am down inside a boat working....reminds me of those old WWII sub movies.

I thought it would be humorous to put a big underwater speaker down in a marina and hook it up to the hailer and either talk or play rap music. Or whale sounds....in the Chesapeake.
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Old 27-03-2010, 00:37   #7
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It never failes to amaze me how far away I can hear another boat when down below. And it sounds loud too; like it's five feet off the bow when it's really a hundred yards away.
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Old 27-03-2010, 05:45   #8
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Columbians?

Either its a diesel working far off...did you see the TV show re drug dealers building submersible boats where just the intake and exhaust vents break the surface? I doubt anyone would confuse shrimp w diesels. I first heard shrimp in Rhode Island's Sonnet river last summer. It was baffling until we figured it out but definetly not confused w diesels.
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Old 27-03-2010, 07:38   #9
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There are many sources, some of them:
- cavitation on a passing ship,
- shrimps,
- fish.

In my place now it is fish. They will wake you up 5 a.m. scrubbing just next to your ear ...

b.
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Old 27-03-2010, 22:44   #10
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the shrimp make a snapping or crackling sound, not a pinging sound.
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Old 28-03-2010, 05:17   #11
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Record it with your iPhone and post the file.
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Old 28-03-2010, 06:11   #12
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I went to the shrimp info page and found the shrimp is also cavitation. (!!!)

Reading the record on the shrimp one can only wonder what sort of damage they may be making to our precious hulls ???

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OK - ;-)))
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Old 28-03-2010, 06:15   #13
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MAYBE--diesel-powered snapping shrimp I need my
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Old 07-04-2010, 13:23   #14
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Well, I'm not 100% on what it was... We moved south to the York Island anchorage and heard it there. That's over 20 miles away from the last anchorage!?!? When we moved up river to Ft Myers, it was gone. I'm guessing due to the fresh water content. So.....Maybe it is shrimp!... Or maybe: Shrimp on Diesel Harley Davidsons!... LOL
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