Cleans tanks and removes algae from tank windows. Attends to aquatic plants and decorations in displays. Collects and compares water samples to color-coded chart for acid analysis and monitors thermometers to ascertain water temperature. Adjusts thermostat and adds chemicals to water to maintain specified water conditions. Observes fish to detect disease and injuries, reports condition to supervisor, and treats fish according to instructions. May fire sedation gun and assist crew expedition members in collection of aquatic life.
