At this time, the end of the sixth millennium and the fifth millennium BC, the first Neolithic cultural groups appear in Egypt. The quantity of archaeological finds does not yet allow us to trace the merging of the Epipaleolithic traditions of the Nile Valley with the cultures of immigrant groups.
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The Pleco or Plecostomus Hypostomus plecostomus is a fish that just about everyone is familiar with. Most freshwater aquarists have added them to a tank at one time or another. This is the catfish most commonly used for getting rid of problem algae in the aquarium. It is one of the hardiest and most enduring of all catfishes. The Pleco is an unusual fish in body shape with its underslung suckermouth, tall dorsal fin and moon-shaped tail fin.