Habituation and retention of habituation in the leech (Macrobdella decora).
D000818:Animals; D006185:Habituation, Psychophysiologic; D006799:Housing, Animal; D007865:Leeches / Q000502:physiology*; D009068:Movement; D010775:Photic Stimulation; D013045:Species Specificity; D014872:Water Movements