What Is Periodontal Disease? If your hands bled when you washed them, you would be concerned. Yet, many people think it's normal if their gums bleed when they brush or floss. In a 1999 study, researchers at the U.S. National Institutes of Health (NIH) found that half of Americans over 30 had bleeding gums. Swollen and bleeding gums are early signs that your gums are infected with bacteria.
Eels like to hide in caves or holes but also need plenty of space to swim. Many species, especially the Spiny Eels, also enjoy burrowing into the substrate. Because most eels are naked or have very small scales protecting their bodies it is important that the substrate is soft, such as fine sand and peat.el-like Fish: Aquarium eels also include many so-called 'freshwater eels' that are not true eels. Yet they are all commonly called eels in the aquarium industry. Other Eel-type fishes include: 1  Swamp Eels. 2  The Swamp Eels are members of Synbranchiformes Order which contains 3 families.
While many true eels are considered delicacies in many cultures, especially in Europe, Electric Eels are not true eels. They are actually a type of Knife Fish. That being said, Electric Eels are not very suitable for human consumption, as they have little edible flesh. Most of their body is composed of the organs that produce the electric shock. As for their diets, they largely eat small invertebrate crustaceans like shrimp and small crabs.