Publication2 med aquascape Publication1cs complete | Page 140

Chuco intermedium and the occasional Eugerres
mexicanus. Fortunately not all the river has been
invaded as a barrier has been created by means of a
concrete bridge. This acts as a barrier, preventing
the devil fish from swimming upstream, stopping
further invasion.
The next day we returned to Chiapas, specifically to
the Rio Corzo, where we expected to find Astather-
os nourissati, however it was not possible, instead
we found Theraps irregularis, Theraps lentiginosus
and Thorichthis helleri.
Both Theraps lentiginosus and Theraps irregularis,
like to swim where the current is particularly
strong. They are riverine species as the hydrody-
namics shape of their bodies allows them to swim
in the currents without too much effort. Their
habitat is rocky, with sandbars and logs on the
banks. I must say that at this point the water had
a turquoise colour to the surface, but under water
it contains large amounts of sediment which
makes it whitish and look cloudy.
Personally I would have liked to spend more
Theraps coeruleus
Rio Bascam, Mexico
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