Last Updated: 2/21/14
Survive in aquariums: Yes
Survive in warm ponds: Yes
Survive in cold ponds: Yes
Plant eating capacity: Low
Algae eating capacity: Moderate
Breathing: False gilled and pulmonate
Breeding: Hermaphrodites and sexual, egg-laying
One North American freshwater limpet is Ferrissia rivularis but there are many. Limpets are abundant locally but may not be present in most areas. They only grow to about 1/3 of an inch at most with many being much smaller. Limpets belong to the Family Ancylidae. They are pulmonates but also have a pseudobranch or false gill. Limpets eat algae and microorganisms. However I got the limpets, no one sells them so you either have them or not!
I found clam-like things (with just the top half of the shell) of about 1/8 to 1/6 of an inch long stuck like glue to my 153 gallon pond filter. I was never sure what they were until someone else asked about them, and they were told they were limpets. With some searching, I found this site which includes photos and verified I have limpets. Or so, I thought. I later came to see photos of leech cocoons (eggs) and now think that is what they are. So, I do not think that I ever had limpets. As such, I removed most of the information from this page on 10/10/12.
Here are two links that are photos of freshwater limpets:
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