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:
- Features of the phylum Arthropoda
- Features of Annelida
- Features of the phylum Mollusca
- Features of phylum Platyhelminthes
- Cnidaria features
Tags: fish features
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