Incorrect - A Lentic Ecosystem has still waters.

Examples include: ponds, bogs, basin marshes, ditches, seeps, lakes, ephemeral pools.

Lentic system ecology is the study of the biotic and abiotic interactions within still continental waters. (Brown 1987)

Brown, A.L. 1987. Freshwater Ecology. Heinimann Educational Books, London. Pp. 163