Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Photo: An assassin snail (Clea helena) at Safari Park Dvur Kralove.

INV004-00069

An assassin snail (Clea helena) at Safari Park Dvur Kralove. As do many freshwater gastropods, they’ll commonly lay eggs on one another’s shells. Particularly if the area where they live is dominated by soft sediments such as sand and silt.

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