The term that nay be used is the harmful algal bloom. Red tide is a phonomenon caused by algal blooms during which algae become so numerous that they discolor coastal waters. The algal bloom may also deplete oxygen in the waters and/or release toxins that may cause illness in humans and other animals.
Plant cell Animal cell 2. Have a cell membrane. 2. Have no chloroplasts. 3. Have cytoplasm. 3. Have only small vacuoles. 4. Have a nucleus. 4. Often irregular in shape. 5. Often have chloroplasts containing chlorophyll. 5. Do not contain plastids.