Question

hag fish cannot be called as a fish
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Answer 1

Explanation:

Hagfish do not have a skeleton, except they do have a skull, which is made of cartilage. Because of this, many researchers think Myxini should not be in the subphylum Vertebrata. However, because of its fins and gills, they are called fish.

Answer 2

Answer:

They lack backbone,paired fins and jaw

Explanation:

• Hagfish do not have a backbone.So due this character they are not true fish. They cannot be considered as fish.
• They also lack some true fish characters like they donot have  paired fins and true jaw. Even they not look like a fish , they have eel like body structure.
• So although they are classified as agnatha means jawless fish but they are not true fish like others.