Kingdom : Animalia
                    Class : Demospongiae
  Scientific Name : Demospongiae
                      Size : 1cm - 3m 
                                 (0.4in - 118in)

            Life Span : 15 - 30 years
                Colour : Green, Red, Yellow, 
                                Blue, Orange, Brown
           Skin Type : Smooth
Special Features : Brightly coloured and
                                non-moving lifestyle
  1. Sponges are extremely slow moving animals found in the sea floors all across the world.
  2. Some of the sponge species attach themselves to objects on the sea floor and do not move all their lives.
  3. The sponge species that do move, move around 1mm a day!
  4. They are believed to have evolved around 500 million years ago.
  5. There are more than 5,000 species of sponge in the world.
  6. Most of them inhabit the oceans and salt water, while around 200 species inhabit the freshwaters.
  7. They have a thin layer of cells that cover the jelly-like substance that they are made up of.
  8. Water can easily flow through the thousands of pores that their body has and that is how they get their nutrition.
  9. They are omnivores, feeding mainly on phytop lankton and bacteria.
  10. Some of the sponge species also feed on crustaceans and small fish on the reefs.
  11. They are found in various shapes like cups, fan, blobs, cones and tubes and sizes.
  12. Their numerous predators are fish, crustaceans, sea turtles and echinoderms.
  13. They are hermaphrodites, having both male and female reproductive organs.
  14. Sometimes the sponges fertilize internally and sometimes externally.
  15. The sponge larvae are capable of moving through water.
  16. As they grow, they settle down on the sea floor and move very less.

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