What type of water is essential for aquatic species?

• A. Water with chloramines
• B. Water with detergents
• C. Water without chlorine
• D. Water without oxygen

Answer: (C)

Water free of chlorine is essential for aquatic species because chlorine and chloramines used to disinfect municipal water are toxic to fish, harming gills and disrupting their ability to exchange gases. Removing these substances through dechlorination makes the water safe for life. Detergents and other cleaners in water are pollutants that can irritate or poison aquatic organisms, so water containing detergents is not suitable. Water without oxygen would not support life, since fish rely on dissolved oxygen to breathe, so that option isn’t viable either. In short, dechlorinated water—water that has had chlorine or chloramines removed—provides the safe environment aquatic species need.