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.
Moray Eel. 1  The Moray Eel is a long, skinny fish that can grow up to 13 feet in length, or twice as long as an adult person. One type of eel, the giant moray, can weigh more than you! 2  Moray eels have tiny eyes, and canât see or hear very well, but their sense of smell is very good, and they use it to detect prey. They have large teeth for tearing the flesh of other animals that they eat, such as other fish or mollusks. An amazing fact about the morays is that they have a second set of jaws in their throat to help swallow their prey! Where do moray eels live? They are found mostly in the warmer oceans of the world. Some burrow into the sediment, and others make their homes in between rocks, which make good hiding places. Although some people think moray eels are mean and like to attack human divers, the eels are very shy.