Recent research has shown that Alzheimer’s patients who viewed an aquarium while eating ate more appropriate amounts of food than patients who did not view the aquarium. Observing an aquarium has much the same influence on people as looking out a window at a natural scene.
Edwards, Nancy, and Alan Beck. 2002. Animal-assisted therapy and nutrition in Alzheimer’s Disease, Western Journal of Nursing Research, vol.24 no.6, pp.697-712