Welcome one, welcome all!!!
Did you know that over 70% of the Earth's surface is covered by water? This makes our planet quite unique, as its the only one in our Solar System with liquid water. So when do we get to rebaptise the planet "Ocean"? ;o)
Did you know that there are over 250'000 identified marine species? 98% of which live on the ocean floors (benthic species) and only 2% in the water column (pelagic species). Plants, animals, micro-organisms... Plants that range from single-celled algae (phytoplankton) to the prairies of seagrass Posidonia oceanica that carpet parts of the Mediterranean seabed, to the impressive kelp forests along the western coast of North America. Microscopic zooplankton which is eaten by slightly larger krill which in turn is eaten by the largest animal on the planet, the massive blue whale! There are animals that live "stuck" on the ocean floor (corals, sponges etc.), and animals that cross vast distances to get from breeding grounds to feeding grounds each year (humpback whales for example). Life on this planet originated in the oceans and eventually crawled out onto land, and in the oceans we can find species which have been around for millions of years!