Reports

River snail

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Some river snails have lived in my aquarium tank. I counted 14 river snails when I removed paved stone. The photo "Snails" shows the river snails. In a few minutes later the river snails made dungs. I also picked up shells of the river snails which had lived in the tank so as not to increase calcareous concentration.

Snail
Fig.1 Snails
DungAll
Fig.2 Snails' dung
DungScale
Fig.3 Enlarged dung

Shells
Fig.4 Shells of lived river snails

Biwa Lake JAPAN
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