Sharks are a group of elasmobranch cartilaginous fishes characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head.. Easy to install—restore your vacuum’s power quickly!
Browse the latest offers available from shark®.. Sharks, having evolved in earth’s oceans more than 400 million years ago, have changed little since their emergence.