Kelp Forest and Sea Otters the Keystone Species NGSS 3-LS4-3; NGSS 3-LS4-4 NGSS Marine Science Lesson is ideal for teaching about kelp, parts of kelp, world kelp forest habitats, ecological balance and the kelp forest food web, physical and behavioral adaptations of sea otters, their diet, survival and much MORE! Interdependent Relationships in Ecosystems Unit This lesson includes: Learning Objectives KLW ChartWhat is Kelp?Parts of KelpKelp Forest ReadingWorld Kelp Forest HabitatsEcological bal