In truth we should be very thankful for seagrass, as seagrass meadows create rich habitat for sea life, defend against coastal erosion and - along with mangroves and salt marshes - sequester carbon. This so-called “blue carbon” represents a whopping 55% of the world’s green carbon, i.e, carbon captured by biological organisms, but unlike trees, which typically sequester carbon for mere decades or centuries, seagrasses sequester carbon for millennia (according to this report).
|Razorfish amongst seagrass.
Seagrasses are flowering plants, which photosynthesize just like land plants; not to be confused with seaweeds, which are plant-like algae. They are found fringing the coastal waters of all continents except Antarctica. My local (South Australian) waters are covered in extensive seagrass meadows of several species, such as Zostera muelleri (top photo).
|Chain moorings creating holes in the seagrass, Lake Macquarie, NSW, Australia