Scientists describe new species of see-through fish from the Amazon
http://news.mongabay.com/2013/0402-new-fish-cyanogaster-noctivaga.html
Scientists have documented an entirely new genus of fish from a river in the Amazon rainforest.
The fish, dubbed Cyanogaster noctivaga or the blue-bellied night wanderer, is described in the journal Ichthyological Exploration of Freshwaters. The species may have gone undiscovered in one of the Amazon's most studied tributaries the Rio Negro because it is nocturnal, tiny and transparent. With a maximum length of 17 mm, it is one of the smallest known vertebrates, measuring only 7 mm more than the world's tiniest fish.
"It is a strange little animal, completely transparent with an otherwise unique color pattern," said study co-author Ralf Britz, an ichthyologist at London's Natural History Museum.
Another reason the night-active Cyanogaster noctivaga may have been undetected is its habitat: the highly acidic blackwater of the Rio Negro. The river is so dark due to dissolved tannins that it is often likened to a cup of well-brewed black tea.
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