No, they have a spine so are vertebrates.
Eels are classified as fish so, like all fish, they are vertebrates. They have a spine and spinal cord, and an internal skeleton. They belong to the Phylum Chordata.Mammals, birds, fish, reptiles and amphibians are all vertebrates.
Yes. They have a spine AKA backbone AKA vertebra.
Yes, all fish of any kind are vertabrates belonging to the phylum chordata. Which means the animal has a spine and spinal chord. Humans also belong to this phylum of animals. Now when we start talking about shrimp and lobsters and such the answer becomes no, invertabrates have no spine and derive their shape from their exo-skeleton. Not all invertabrates however belong to the same phylum.
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
in eels
electric eels have an electric current that shocks thing Moray eels dont
eels eat fish
Eels are classified as fish!
Eels have electricity.