Chondrichthyes are vertebrates that include sharks, skates, and rays, with an estimated 40,000 living species. The Class Chondrichthyes evolved around 419 million years ago based on current evidence. Characteristics of Chondrichthyes generally include a skeleton primarily composed of cartilage and have paired fins.
Kingdom: Animalia
-Phylum: Chordata
–Class: Chondrichthyes
I have photographs only one Chondrichthyes so far:
–Whitetip Reef Shark (Triaenodon obesus)