Brown algae include a number of edible seaweeds. They will also inhabit areas with good covering of kelp and other seaweeds. It also feeds on aquatic plant-like algae, such as seaweeds. The mixture of seaweeds and blue green algae may serve as ideal fertilizer. They are usually found in schools feeding on seaweeds and invertebrates. It also boasts a variety of marine habitats, with rare seaweeds, sponges and corals. It feeds by scraping minute algae and grasping pieces of seaweeds. The brown algae include the largest and fastest growing of seaweeds. Kelps are large brown algae seaweeds that make up the order Laminariales. In the absence of plant-eating fish, seaweeds deprive corals of sunlight. Seagrasses, seaweeds, and soft corals are often found there. Young crabs live among seaweeds and seagrasses, such as "Posidonia oceanica", until they reach adulthood. Production of tilapia, mud crabs, seaweeds, milkfish, and mussels have been incorporated. "Tsukudani" can be made with kombu or wakame seaweeds. Philippine waters also sustain the cultivation of pearls, crabs, and seaweeds.