A brief explanation of some of the features is given to illustrate the differences in design of each type. RAYS Frog fishes, Anglerfishes, Pearl fish and Handfishes. Morays are so different to your conventional fish. The modifications to their body are major but they are still a fish. I had seen ten million morays until I really started to look with my brain as well as my eyes.
Eels have a very long cylindrical body which is very muscular.
They do not have a gill cover. They do not have a tail fin. They do not have scales. Instead, they have tough thick skin. The lateral line is very short, ending at the gill opening.