The value of mangroves and mangrove ecosystems has not always been recognized. In fact, mangroves were historically regarded largely as wastelands with little or no value. Over time, humans began to recognize the multiple ways in which they could be used, particularly through development, making the mangrove ecosystem vulnerable to destruction and depletion, a globally alarming issue. Mangrove depletion is presented here as socioscientific issue cases with activities designed to promote and strengthen ocean literacy. Through these activities, students can explore scientific concepts relating to mangrove ecosystems while fostering moral and ethical reasoning to determine what is affected and valued, and who shares responsibility. (Contains 4 figures, 9 tables and 2 notes.)