Describe the differences among fish from the most primitive to more advanced types?

  • Thread starter Thread starter Sonjonnia
  • Start date Start date
S

Sonjonnia

Guest
Fish do not all have the same skeletal structure. I know these are the fish groups.

The three main evolutionary groups of fish; 1) the jawless fish (Agnatha), 2) the cartilaginous fish (Chondrichthyes), and 3) the bony fish (Osteichthyes).
 
Back
Top