unexplained death of my Deresa Clam
Posted 12 February 2010 - 11:41 AM
about 3 weeks ago, I was faced with the unexplained death of my beloved Deresa Clam, which went from healthy and growing, to a gaping and dying clam. At the time, I could not understand why it should be, but decided to do a little research on the subject.
There are a number of reasons for these inexplicable deaths and I started to keep a watchful eye on my remaining Squamosa Clam, which still appears in good health. This morning, whilst spending some time doing a water change and general maintenance, I decided to give the squamosa a quick health check by lifting it out of the water and doing a visual check.
These are what I found hanging around the underside of the shell, by the bysal opening. The largest is about 9mm.
They are called Pyramidalid Snails and are parasitic to clams. They can cause death by their constant feeding from the flesh of the clam and can reproduce rapidly. Although some Wrasses will eat them, they live a very secluded life under the shell of the clam which makes them difficult to irradicate. I now need to consider a course of action to deal with them, and my first thoughts are to make a stand for the clam to sit on, raised above the gravel, until I can get rid of them. I will be doing regular inspections from now on, until it gets a clean bill of health.
If you have clams, I would certainly advise taking a good look at them from the underside.
Posted 12 February 2010 - 12:32 PM
I keep a banana wrasse for that very purpose. Once a month or so I turn the clam on its side and the wrasse comes over and picks them off individually and smashes them to pieces. Its now got to a point where he's exhausted his supply and the clam if happy with no further pests.
Posted 12 February 2010 - 12:44 PM
Posted 12 February 2010 - 02:45 PM
Shame for the clam but atleast you have an explainiation, I hate losses when you can't account for them
Check out www.Reefpark.net if you have a minute
Posted 12 February 2010 - 08:03 PM
Posted 13 February 2010 - 07:39 PM
Posted 25 May 2011 - 09:17 PM
We've spend every night since the weekend after the lights go out with a syphon and head torch erradicating the pests, hopefully we are on top of it and the clams are coming out a lot better. One clam I could get out of the tank being only as big as my hand and gave it a good scrub, but the other is too big to lift so just perservering with the syphon.
Thanks Lyds for the advice, I would never have known they were a pest.
Posted 30 May 2011 - 02:26 PM
Posted 31 May 2011 - 06:55 AM
quick question, in a system that has never had a clam, would these snails still be present??
also, where do the snails come from in the first place? do they hitch hike on the clam from when you buy it?
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