Cartilaginous Fishes, scientifically named: Chondrichthyes
Phylum: Chordata
Distinguishing Features: jawed, paired fins, skeleton made of cartilage, no ribs (if they leave water, their body weight will crush their internal organs), no bone marrow - spleen makes RBC's, skin covered with dermal teeth, breath through 5-7 gills, mostly live births.
Examples: Saw Shark, Guitar Fish, Torpedo Electric Ray - can generate up to 200 volts!!
---
FC and AT
No comments:
Post a Comment