Contains overview, types, appearance, families, definitions, and links to related information.
Contains classification tree. With links.
Shows images of different member species. With names and links to related sites.
Offers shark links.
Contains family descriptions. With links.
Provides brief discussion on the group. With photos and links.
List seven families under this order.
Overview of characteristics, evolutionary inter-relationships, life history and taxonomy. With photos and links to related sites.
Discusses classification, features and class etymology. With links to related sites.
Provides brief lecture on the group. With links to related sites.
Lists member species.
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