The diamond dust has the same properties of larger diamonds, but the tiny diamond particles cannot be set into jewelry by themselves. It is carefully gathered after cutting, and comes to good purpose in many industries.
Larger sharks, including great whites, tiger sharks and whale sharks, travel more widely and have greater depth range in the water column. Great whites dive deeper than 1km and are seasonal visitors to temperate coastal waters, lured by the likelihood of a feed at seal and sea-lion rookeries and haul-out areas.
Sharks belong to the superorder Selachimorpha in the subclass Elasmobranchii, in the class Chondrichthyes. The Elasmobranchii also include rays and skates; the Chondrichthyes also include Chimaeras. The first sharks appeared in the oceans 440 million years ago. Listed below are extant species of shark. Sharks are spread across 511 described species in eight orders. The families and genera within the orders are listed in alphabetical order.