title: Orientation to Objects in the Sea Urchin Strongylocentrotus purpuratus depends on apparent and not actual object size.
authors.affiliation: Bamfield Marine Sciences Centre, Bamfield, British Columbia, Canada.
authors.forename: Emily
authors.initials: E
authors.lastname: Jackson
authors.forename: Sönke
authors.initials: S
authors.lastname: Johnsen
mesh_terms: D000818:Animals; D009949:Orientation; D047270:Strongylocentrotus purpuratus / Q000502:physiology*