Mako sharks are fish-eating special-
ists, able to chase down and grab
such elusive prey as tunas. The teeth
in both jaws of this Shortfin Mako
Shark, Isurus oxyrinchus, have the
classic stabbing shape characteristic
of sharks that feed primarily on slip-
pery, fast-swimming prey such as
fish and squid. Photo by Didier Descouens,
Wikimedia Commons, http://en.wikipedia.org/
wiki/File:Isurus_oxyrinchus_Machoire.jpg
The Kitefin Shark has very different
teeth in its upper and lower jaws.
The upper teeth are spiky, and the
lower teeth are triangular, the re-
verse of the condition in most sharks
with different upper- and lower-
jaw teeth. The Kitefin catches fish
and squid with its upper-jaw teeth
but uses its lower-jaw teeth to bite
chunks out of large prey, as does its
close relative the Cookiecutter Shark.
The lower jaw of sharks is more mo-
bile, helping in this feeding behavior.
Photo by Luca Oddone, Wikimedia Commons,
http://en.wikipedia.org/wiki/File:Dalatias
_licha_jaw.JPG
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