Eel
Eels were cold-blooded aquatic vertebrates with serpentine bodies and a minimum of appendages. True eels were fish, although throughout the galaxy there were numerous species of animals referred to as eels.

Some eel-like creatures were seen swimming in a lake on Archer IV. ()

The Xindi-Reptilian biorifle weapon was powered by a lifeform resembling an eel. Its neural pathways modulated the weapon's power output. ()

The Xyrillian ship encountered by  in 2151 had a tank in which eel-like creatures could be seen swimming in liquid through windows. ()

Types 
 Caldorian eel
 Ceti eel
 Eel-bird
 Electric eel
 Hanonian land eel
 Klabnian eel
 Krallinian eel
 Osmotic eel

See also 
 Waldo

External links 
 
 

de:Aal
Animals