Saw sharks are true selachian sharks
that have evolved the same basic
body form as the sawfishes, which
are actually batoid rays. Because
saw sharks are relatively small deep-
water animals, good photos of them
are comparatively rare. (To p) Illus-
tration of an Australian Shortnose
Sawshark, Pristiophorus nudipinnis.
(Bottom) Photograph of the head
and saw of a South African Sixgill
Sawshark in the British Museum of
Natural History. To p, illustration from the
Illustrated Catalogue of the Fishes of South Aus-
tralia (Adelaide: G. Hassell & Son, 1921 ), cour-
tesy of the Freshwater and Marine Image Bank,
en.wikipedia.org/wiki/File:Pristiophorus_nudi
pinnis.jpg; bottom, photo by Gene HelfmanGuitarfishes are sharklike rays that
spend their lives lying on the bot-
tom, often in shallow water. This
Shovelnose Guitarfish (Rhinobatos
productus), a common species along
the California coast, shows well
where the common name for the
group comes from. Photo by Jot Powers,
Wikimedia Commons, http://en.wikipedia.org/
wiki/File:Shovelnose_guitarfish.JPG