_{Along the right bank of the hardly 6 metres broad Caño Tonnina below this small water fall in the deep jungle, and the dark over-hanging tree-roots, below the surface deep under these roots (lower photo), in the complete darkness, Heiko found a variety of miniature fishes, together with some knife fishes, see below…}

_{Nannostomus cf. digrammus – 17 mm SL…}

_{Apistogramma cf. bitaeniata – 26 mm SL (possibly only a different bitaeniata population)…}

_{…two different species of Elachocharax, sp. 1 (upper) and sp. 2 (lower) – 12.5 mm and 11 mm SL (respectively) and a tiny shrimp which was much bigger than the latter…}

_{Odontocharacidium cf. aphanes – 13 mm SL…}

_{Crenuchus spilurus – 21 mm SL…}

_{Steatogenys cf. duidae (upper) and Microsternachus aff. bilineatus (lower)…}

_{…and Ancistrus sp. 1, almost certainly a new species, all living in this tiny, nano-biotope.
Below a video made by Natasha from the same Caño Tonnina, but in the open water, further down stream, in a hole hardly 6o cm deep and maybe 1.5 metre across, the rest of the creek was very shallow, although the rainy season had started already}