Fish that eats and damage coral reefs but their feces can be beneficial. Click to read more. Coral reefs are known to be some of the world's most significant marine ecosystems serving as shelter and source of food for fish and other marine animals, as well as for microorganisms.
is a new challenge, which is silt, the silt on the ocean floor here, some 2.8 miles deep. tell me what kind of challenges that will pose. yeah, so, in some ways, it s a good sign that there is a lot of silt down there, because that means that, actually, the currents aren t that strong. what this silt is, it s essentially dead plankton. it s the carcasses of everything that lived above it, including, for instance, things also like fish poo. fish poo slowly falling down through the ocean and at the end ending up on the ocean floor. and because the currents aren t very strong, it will actually get thicker and thicker and thicker. this layer can easily be 20 meters in some regions of the ocean. all right, erik van sebille, giving us something new to think about yet in the search for flight 370. i don t think there s a single question we could ask this man he would not have the answer to. i know. really appreciate you being here with us this morning. thanks, erik, from sydney.