Biodiversity encompasses the vast array of living organisms and their interactions. Scientists study how various species adapt, or struggle to adapt, to environmental changes. Understanding the importance of biodiversity is vital for promoting sustainable development, as it influences our culture, society, and economy. This virtual journey includes videos and activities that link to each other. Videos in this lesson plan introduce students to scientists, demonstrate how students can participate in citizen science, and provide background knowledge for the activities. We suggest watching the videos and choosing the activities that best suit your class or adapting them to suit your class. Objectives and Outcomes: 1. Explain what biodiversity is and its importance. 2. Identify the causes and issues and describe the consequences of biodiversity loss in the ocean, encouraging students to adopt environmentally responsible behaviours and make ethical decisions to preserve biodiversity. 3. Debate, discuss, and challenge different perspectives and issues related to biodiversity.