Characteristic features of class pices
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They are placed under the phylum - Chordata and subphylum - Vertebrata
Pisces can be divided into two classes – Class Chondrichthyes (cartilaginous fish) and Class Osteichthyes (bony fishes).
Class Chondrichthyes –
- skins are covered with placoid scales
- skeleton is cartilaginous
- tail fins are asymmetrical
- fertilization is internal
- cold blooded
- no external ears
- operculum over gills are absent
Class Osteichthyes
- Skins are covered with cycloid scales
- Skeleton is bony
- Tail fins are symmetrical
- Operculum is present
- No external ears
- Cold blooded
- Fertilization is external
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