![]() ![]() ![]() Determine the period of the satellite's orbit in hours. All adult sponges are sessile, meaning they live permanently attached to rocks or other submerged objects and do not move about on their own. They are found in shallow ocean environments to depths as great as five kilometers (km). But researchers report today in Current Biology that deep in the Arctic Sea sponges do creep and they sacrifice pieces of their own bodies to do so. Although the majority of sponges are marine, some species live in freshwater lakes and streams. ![]() Sponges respire through a process called diffusion. Trending Questions Is there a star named Mikaela? What is the antinym for earth? What date was the moon pie invented? What is the temperature on Gemini? What day of the week was named by the Babylonians? A satellite moves in a circular orbit around the Earth at a speed of 4819 ms. Sea sponges don’t move or so many scientists believed. Sponges are animals that belong to the phylum Porifera, which means 'pore-bearing.' Sponges breathe by moving water through pores, called ostia, which cover their body. ![]()
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