Diverse Sea Pens: Habitat Builders of Vibrant Underwater Fields2024-05-03ਜਾਨਵਰਾਂ ਦਾ ਸੰਸਾਰ: ਸਾਡੇ ਸਾਥੀ ਵਸ਼ਿੰਦੇ ਵਿਸਤਾਰਡਾਓਨਲੋਡ Docxਹੋਰ ਪੜੋWhen they anchor to and withdraw from the sea floor, they add oxygen, nutrients and organic matter to it. In this way, they create complex, stable and secure habitats with a rich food source for many delicate beings.