The coelacanth is one of a small handful of living fishes that are
probably closely related much more ancient, extinct creatures —
including, the first fish to haul itself up onto land.
Now
scientists have sequenced its genes and are digging through the data in
search of genetic clues to how fish and land-dwelling animals are
connected to one another. Among the finds so far, a gene that seems
to be connected to how animals grow placentas. Coelacanths don't have
placentas, but they do have eggs that hatch inside their own bodies.
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