Learning Task 3: In both estuary and intertidal zone, organisms have different roles to perform. In this task, identify the organisms that perform the given roles. Choose the word/ group of words in the box. Salt marsh grasses algae phytoplankton hichens cyanobacteria sea urchins green crabs mollusk anemone fish shellfish marine snail small crab sand fleas diatoms fungi bacteria tube worms fiddlers detritus feeders seaweeds Role Description Organism Producers They are organisms that produce food from sunlight and inorganic substances. Consumers They are organisms that eat other organisms. Scavengers They are organisms that eat food scraps and left-overs. Decomposers They are organisms that breakdown into simpler materials the remains of dead organisms.​