Physa acuta

European physa, Left-handed pondsnail at Fyshwick, ACT

Physa acuta at Fyshwick, ACT - 8 Dec 2020 06:00 PM
Physa acuta at Fyshwick, ACT - 8 Dec 2020 06:00 PM
Physa acuta at Fyshwick, ACT - 8 Dec 2020 06:00 PM
Physa acuta at Fyshwick, ACT - 8 Dec 2020 06:00 PM
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Identification history

Physa acuta 17 Dec 2020 trevorpreston
Gastropoda sp. (class) 8 Dec 2020 MichaelBedingfield
Unidentified 8 Dec 2020 Ct1000

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User's notes

These minuscule snails were seemingly feeding in the ponds at jerrabomberra. At the absolute most they would be as big as the top of my pinky in length.

3 comments

   8 Dec 2020
We have no experts on molluscs just yet. Will park it here until later.
   16 Aug 2021
I agree that this sighting appears to be an instance of a water snail feeding just beneath the water surface. From what I can gather they have the ability to crawl just below the air-water interface, manipulating their foot in such a way as to form a cone-shaped funnel into which an inhalant current is generated, thereby drawing food particles into the funnel to be ingested. I find this type of feeding behaviour very interesting and a fascinating skill.
Michael123 wrote:
   16 Aug 2021
might be Physa acuta, if it had 4 or 5 finger-like tentacles on the underside of the shell emanating from the shell aperture, that's what it would be

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