are an important group of heterokont algae. Most live in fresh water, but some are found in marine and soil habitats. They vary from single-celled flagellates to simple colonial and filamentous forms.
When Takashi Amano introduced the Yamato numa shrimp to his planted tanks in the early 1990s, he revolutionised natural algae control. This see-through, unassuming freshwater shrimp eats algae ...