Necturus normally forage at night, when they leave their favored hiding places and move slowly over the bottom seeking food. Slow, undulating movements of the tail propel them; the legs seem scarcely used.
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Harris, Joseph P. Jr.
"The Natural History of Necturus: III. Food and Feeding,"
Field and Laboratory: Vol. 27
Available at: https://scholar.smu.edu/fieldandlab/vol27/iss3/2