Like most fish or other aquatic creatures, they have gills that take in oxygen from the water they swim in.
Thy come to the surface every ten min. To breathe atmospheric air. They do have gills, but they only act as a secondary oxygen source. They rely on their mouths much more.
in eels
Oxygen. Living things, even ones with gills, need oxygen. The gills filter the oxygen out of the water. If you had a fishtank that did not have plants or something that mixed oxygen into the water, the fish or eels would suffocate.
The types of eels are salt water eels, freshwater eels, the swamp eels, rubber eels and the electric eels. It is an elongated fish that lives in the shallow waters.
We do not know as eels do not leave good fossils. Also your English is a bit wrong your question should be worded "How many extinct eels were there". This is because if they are extinct they would have lived in the past not the present.
Adult eels are called eels, babies are elvers
electric eels have an electric current that shocks thing Moray eels dont
eels eat fish
Eels have electricity.
Eels are classified as fish!
Eels are not naturally in Utah's bodies of water but there are eels in pet shops and aquariums.
EEls only eat flies if they are green eels, otherwise they ae very dangerous to eels and may kill the eel :(
Neither. Eels are not herps (amphibians or reptiles). Eels are a type of fish.