1. Aquatic Gnathostomata containing gills.

2. Paired and Median fins present. The limbs, if present are not penatadactyle.

3. Fins with fin rays.

4. Endodermal exoskeleton.

External ear absent.

Related posts:

  1. Features of the phylum Arthropoda
  2. Features of Annelida
  3. Features of the phylum Mollusca
  4. Features of phylum Platyhelminthes
  5. Cnidaria features

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