A theoretical model developed by Stone describing a three-level trophic system in the Ocean is analysed. The system consists of two distinct predator-prey networks. linked by competition for nutrients at the lowest level. There is also an interaction at the level of the two preys. https://www.diegojavierfares.com/amazing-price-Rubbermaid-8-Gallon-Plastic-Home-Office-Wastebasket-Trash-Can-with-Liner-Lock-p12316-big-deal/