Home> Animals > Sea Life Submit Your Photo Slide Show No 19 Of 32 Prev    Next Shark  Publish Date : 21-03-2008 Author : GerryD Hits : 253 Rating : Not rated Sharks (superorder Selachimorpha) are a type of fish with a full cartilaginous skeleton and a streamlined body. They respire with the use of five to seven gill slits. Sharks have a covering of dermal denticles to protect their skin from damage and parasites and to improve fluid dynamics; they also have replaceable teeth. Rate This Photo 5 - Best4321 Add Your Comment Your Name * Your Comment * Enter Validation Code * Prev    Next