'(<a href="http://www.j-archive.com/media/2011-06-02_DJ_20.jpg" target="_blank">Sarah of the Clue Crew delivers the clue from Antarctica.</a>)  Researchers recognize individual whales and follow their migration based on the pattern on the underside of this, each half of the whale's tail'
the fluke
MARINE BIOLOGY: Researchers recognize individual whales and follow their migration based on the pattern on the underside of this, each half of the whales tail
Researchers recognize individual whales and follow their migration based on the pattern on the underside of this, each half of the whale's tail
Researchers recognize individual whales and follow their migration based on the pattern on the underside of this, each half of the whale's tail
MARINE BIOLOGY
the fluke
MARINE BIOLOGY