![]() ![]() As water filters through a sponge's porous exterior, the sponge gains some motion, receives food and oxygen, and dispels waste. Upon sight it is admiring and in some way looks like abstract decoration however it is more useful than it looks! It is a filter feeder which means that it filters water around it for nutrients. They do not have a nervous system so that means that they do not move when they are touched, so you can really get up close and check them out! The skeleton of a sponge is formed from spicules which are made of a glass like material or calcareous materials and a spongin which is a protein that supports the spicules. Some are in charge of digestion, some reproduction, some bringing in water so the sponge can filter feed, and some are used for getting rid of wastes. They do not have tissues or organs like some animals do rather, they have specialized cells to perform necessary functions. Sponges are relatively simple multi-celled animals. It weighs up to around 20pounds and has an amazing life span of up to 2300 years! ![]() It can reach around 50 cm and can be characterized by its flexible brown tubes. This prickly tube – sponge is a sponge found in the Red Sea, its complex name is Callyspongia crassa. Just like fish there are many different types of sponges in the sea and although when you look at it you may not think that it is an animal, it actually is! There are over 6000 species of sponges and most live in the marine environment. ![]()
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