Hello,

Features of class chrondrichthyes

• These are found in Marine habitats
• Cartilaginous fishes
• Body is dorsoventrally flattened or laterally compressed
• Pelvic fins have claspers in male
• Have heterocercal tail fin
• Endoskeleton is cartilaginous and dermal placoid scales present 'Swim bladder is absent
• Cold blooded or poikilothermous
• Oviparous or ovoviviparous
• development is direct
• Some have electric organs like Torpedo.

Hope this helps.