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.
Remove these ads. 1  There are over 400 species of eel. 2  Eels live in both saltwater and fresh water. 3  Even though the eel looks like a snake it is really a fish. 4  Eels have gills and very sharp teeth. 5  Most eels hide and live in caves and rock crevices. 6  Some species of eels travel up to 4,000 miles to breed. 7  After the eel breeds, it dies. 8  Eels begin ... Eels live in both saltwater and fresh water. 2  Even though the eel looks like a snake it is really a fish. 3  They have long, narrow bodies with long dorsal and anal fins. 4  Most eels have no scales.