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Limpet Infestation
4/22/13 Keyhole Limpets and Other Snails, repro., comp. --
3/10/11 Stomatella Spawning Constantly in Nano! Help!
4/9/10 Re: Stomatella Spawning Constantly in Nano! Help!
4/12/10 Tech - I from Kent Marine, and limpets 5/22/04 Good morning to all, <and to you in kind> Just a few questions for you, hopefully you can help. You usually have all the answers. I am curious if tech-I iodine supplement from Kent is okay to use. The label says it has free iodine. My test kit says it is a bad thing. <somewhat subjective here. There seems to be two "camps" regarding advocacy of Lugol's strong iodine solution (the nutritive iodine of color/odor) versus clear Potassium Iodide solutions. The other troubling thing is several keyhole limpets in my hospital tank. I believe both can be useful, both can indeed be abused/overdosed too. I favor Lugol's based solutions FWIW. I'm not a bog fan of some bottled supplements though... then ones that do not date their products for products with a definable lifespan/shelf-life. Iodine loses efficacy over time once mixed ion solution> scoured WWM and have found two different opinions. Bob says okay and Anthony says they will eat soft coral flesh. I did find a big one sitting on my flower leather, so I pulled him off. <some Limpet species are algae grazers, and some are predators on various reef invertebrates including corals (these tend to be the colorful ones with frilly/fleshy mantles). It depends on the species.) Thank you for always being there for me and my tanks. Thanks, Hopeless reef keeper- Daniel <best of luck, Anthony> Stomatellid Snail... a Good Guy - 9/20/03 I have your latest invert. book and I found the creature I'm looking for which came with some live rock I bought but it doesn't mention whether it is harmful to soft corals or other reef creatures <hmmm... do check again, my friend: page 202 photo caption (underfoot pic) of Stomatella... "a harmless, nocturnal herbivore to be shared among aquarists." They are very strict herbivores in fact and are completely safe with corals> also I have a crab about the size of a quarter that is a grayish black large front claws and a rough texture doesn't like light in fact they seem quite common in live rock I had them before (good or bad) <most crabs are risky as opportunistic omnivores... I rarely recommend crabs for reef aquaria. I suggest you remove it to another aquarium. Kindly, Anthony> Removing Limpets Hello! How are you? <Not too bad this morning.> I have quite a few keyhole limpets in my tank, and I would like to send some of them to another member of our seahorse group. There were a lot of limpets on the glass of my tank a few days ago, so I thought it would be easy just to swoop them out with a net. Wrong! Every time I even touched them with the net they would lock down with incredible force. I read somewhere that they can lock down with 70 lbs of pressure. Do you have any suggestions on how I could get a few of them out so that I can honor my promise to send some to my co-hobbyists? <If you grab hold of them and twist, you should be able to free up a couple. Removing from the glass is best. It would be very hard to remove them from the rocks without damaging them.> Thanks, Kevin <You are welcome. -Steven Pro> Limpet Attacking a Flame Scallop? Last night I saw a Limpet attached to the bottom of my Flame Scallop and I didn't think anything of it until I looked at my Scallop this afternoon and when I tried to get the Limpet off of my Flame Scallop he felt like he was locked on my Scallop, and I had to actually pry him off. <Yes, it is very difficult to remove a Limpet from any surface. They have an incredible suction power.> My Scallop looks like he was dying. <Agreed> He is shrinking up on the inside and I don't know what is wrong with him. <Please perform a search of Flame Scallops on www.WetWebMedia.com for the reasons.> He is not responding to touch like he used to, his shell does not close right away when he is touched, and when you try to close him it feels like he is almost locked in the open position. I did some research on Limpet's this evening and I didn't like what I read on some of them. <Perhaps do some research on Flame Scallops. I am positive you will not like what you find about them.> Is it possible the Limpet was boring a hole in him and getting ready to eat him? <Nope, your scallop is and has been starving to death.> My scallop was fine for months until now. <No, you just did not notice its duress.> Please give me your suggestions on what could have happened to him <It is starving just like almost all do.> and what his chances of survival are. <Next to none.> Thank you for you great expertise! Connie <Please research your animals and their care prior to all purchases. -Steven Pro> Limpets A year ago I noticed two limpets in my aquarium. It is a 90 gallon (6'x1'x2'). My guess is they came in on the live rock I added 7 months before. The curious thing is this. It took 7 months to see the first 2, and I now have roughly 100 more. They are black with a white stripe on their back and are actually not unattractive despite their numbers. They do a good job keeping the glass, and everything else, clean. They range in size from 1/4 inch to 1 1/2 inch and are found everywhere from the skimmer collection cup (always a few small ones on the cup of a CPR Bak-Pak), to the live rock, to the glass. I have about 80 pounds of Fiji live rock, a 1 inch aragonite sand bed, the CPR, and a couple Hagen 802's for circulation. I also have Naso, yellow, and regal tangs (1 of each--all about 3.5 inches), a coral banded shrimp, a false percula clown, and about a dozen snails and small hermits. There are no corals or anemones. Ammonia and nitrites are 0. Nitrates are close to 50. S.G. is 1.024. Temp. is 76 and pH is 8.0. I add no chemicals and have 0 algae other than coralline which covers most everything and has to be scraped from my glass at least every two weeks. I have two questions. First, is this an extremely unusual occurrence? In order to identify these things I had to post pictures to a newsgroup since the few inexpensive books I have don't even mention them. Second, I'll be adding a dwarf lionfish and snowflake moray to the system tomorrow. Will either/both decide to make a feast out of the limpets? If they do, it would probably be good for them, since, in their numbers, I think the limpets would be able to sustain enough of a population to meet their dietary requirements. By the way, when I first set up this system roughly two years ago, I dosed Kalkwasser for about 2 months to try and get the coralline to grow, and it didn't. Ever since, I have added no chemicals (other than synthetic salt and frozen food for the fish) to the aquarium, and the coralline is almost out of control. It's a great problem to have. By the way, I have 6 24" fluorescent bulbs. Four were bought at home depot (cheap bulbs), while the other 2 are actinic. I also have a large population of feather dusters growing out of the rock and some have even built tubes of up to 2 inches and are living in the sand bed. Is this extraordinary luck, or did I accidentally hit on the aquarium conditions that the worms, coralline, and limpets thrive in (i.e., low light and not-so-low nitrate)? If my experience is unusual, I'll probably try to replicate the environment (minus the fish) in a 29 gallon, devote some study to all three, and write a paper detailing the conditions for anyone that might want to duplicate them (though their suitability would be limited to a fish only situation). Any guidance would be appreciated. Thank you in advance for your time. Sincerely, Richard Weatherly >> Wow, what an outstanding query, relating of experience and uplifting story... Congrats to you. And I think you may be on the verge of a great commercial success. I have only seen a few cases where the snails called limpets were so abundant as yours... and they are a blessing... And your lion and eel will not consume them (different diets all the way around), but I would do as you say, and save some of these "Chinese Hats" in another system... if for no other reason, for just safekeeping. And do "share the wealth" and supply some to fellow hobbyists... Your relating of the non-supplement use and results is exemplary by the several meanings of the term... Thank you for writing... please do consider tallying up your observations and sending them to one of the hobby magazines... Very useful. Bob Fenner Gastropods/Snails/Limpets and an Over Abundance 12/5/05 I'll save space and your having to read by not listing our tank setup - if you need to know the setup to answer this question, let me know and I'll oblige. <Okay.> We setup 90 gal tank with 130 pounds Fiji and Marshal island live rock about 5 months ago. Within a week, we found a large cap snail hitchhiker...5 months later, there's so many in the tank (also a few in the refugium) we lose count to get an exact number. I've read if you know how many snails you have, you don't have enough, <This sounds like a retailers slogan 'I to have heard such ludicrous rules of thumbs such as this one and the common 'One hermit and snail per gallon rule' which is to say the least ridiculous.> but is there such a thing as TOO MANY CAP SNAILS? <If you have an overabundance this means that there is sufficient algae to support them. The algae is fueled by nutrients. So if you want the herd to be naturally thinned out I would check your system for detritus build-ups and watch how much you feed. Water changes are your friend.> If so, is there a natural predator for them? <Yes likely any mollusk and crustacean predators such as wrasses and puffers. However they will not limit their predation to just your snails, your microfauna population would be adversely affected as well as any other small critters in your tank.> cheers <To you too.> Donna <Adam J.> Snails Everywhere! Hi everyone , I am a little concerned about crustaceans that are in my tank. I seem to have small , about a quarter inch, snails and also limpets in my tank , I have soft corals as well as mushrooms and polyps. Are these critters harmful to any of my other occupants . Thanks Rich <Well, Rich- without seeing them for myself, I can only generalize (gulp!)...Most of the commonly encountered snails and limpets are harmless...I'd keep an eye on population levels, and if you start noticing damage or excessive populations, you may need to remove some. The upcoming "Reef Invertebrates" by Bob, Anthony, and Steve Pro may be a big help in identifying these little guys. Take care! Regards, Scott F> Limpets and Coralline Crew: Well after trying to figure out what I can't grow coralline algae in my tank, I think I have finally identified a suspect. I have a few of those odd little creatures known as limpets (Elephant Snail, Keyhole, etc.) and according to an article by someone named "Steneck" http://academics.smcvt.edu/dfacey/AquaticBiology/Coastal%20Pages/Limpets.htm These things only eat coralline!! It really makes sense now because I could see little patches of coralline one day, only to wake up the next morning to find them vanished! All water parameters, Ca, dKH, etc. are all perfect - no phos, no nitrates, etc. I guess I'll continue to let them battle it out (I refuse to attempt to remove one of the limpets for fear of damaging him) and see who wins - right now, it's no contest! You agree that this is possible? <Definitely. These are voracious grazers. Best, Chris> |
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