Estuaries possess distinct blooms of excessive growth of a pigmented dinoflagellate. These blooms are called

1. Estuaries, being nutrient-rich environments, can sometimes experience rapid and excessive growth of microscopic algae or phytoplankton, known as blooms. 2. When these blooms involve certain species of pigmented dinoflagellates (a type of plankton), their high concentrations can discolor the water, often giving it a red or brownish hue. 3. These specific events are commonly referred to as red tides. Some red tides can be harmful, producing toxins that affect marine life and humans.