Abstract: The invention provides an invertebrate pest detention profile for an extruded channel of rigid or flexible material which may be deployed as a partial or open contour, or a closed contour to establish a defensive line or perimeter to prevent crawling pests or invertebrates such as slugs from traversing the line or boundary. The profile provides a moat for offering a liquid or viscous attractant which retains pests by intoxication, or simply provides a shape too complex for them to overcome. The detention profile disclosed herein may be a component fitted to or incorporated within a garden pot, or built up from components of a pot for a garden plant to deny invertebrates or crawling pests access to a plant in the pot. The detention profile also hides the pests from immediate view and hinders access to them by pets or children.