Water enters the sponge’s body through multiple small openings called pores, and it exits through a larger opening. They get food by filtering out plankton, bacteria, and tiny particles of organic (formerly living) matter that float in the water. Sponges have developed a special way to feed themselves, even though they cannot move. Sponges do not move around they attach themselves to rocks and reefs. The bodies of most sponges are supported by tiny thorn-like structures called spicules. Many sponges are soft and smooth, but others are hard and rough. Marine sponges are some of the oldest animals on Earth-they have been around for more than 600 million years! These animals are invertebrates, which means that they lack a backbone. So, the research must continue! Sponges and Their Bacterial Friends Yet, we know little about the potential of this tiny and magnificent world. But what is even more interesting is that these substances can be used to improve human health and the health of the environment. These bacteria produce substances that can help sponges to get stronger and to thrive even in very polluted places. Scientists discovered that various bacteria live inside sponges. Sadly, marine sponges are at risk of disappearing forever, because of the pollution of the oceans. These animals have bodies full of holes and live attached to a surface. In reality, those objects are all based on ancient living creatures found in aquatic environments, called marine sponges. When you think of sponges, what comes to your mind? Some people might think of bath, kitchen, or makeup sponges.
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