Willem Kolvoort / Tetra (Moenkhausia surinamensis) under Apinagia leaves. Awadan rapids, Gran Rio, Suriname, September.
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Willem Kolvoort / Tetras (Moenkhausia surinamensis) surrounding a mimic (central fish). Near the Awadan, Gran Rio, Suriname, September.
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Willem Kolvoort / Redeye Piranha (Serrasalmus rhombeus). Gran Rio, Suriname, September.
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Willem Kolvoort / Rapid near Peti in the Awadan system, Gran Rio, Suriname, September 2012.
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Willem Kolvoort / Poptella longipinnis (long-finned fish) with Aracu (striped fish). Gran Rio, Suriname, September.
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Willem Kolvoort / Podostemaceae river weed (Mourera fluviatilis) flowers above water and Apinagia leaves underwater. Gran Rio, Suriname, September.
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Willem Kolvoort / The leaves of Podostemaceae river weed (Mourera fluviatilis) with endmeic fish (Moenkhausia surinamensis). Gran Dan rapid, Gran Rio, Suriname, September.
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Willem Kolvoort / Flower of Podostemaceae river weed (Mourera fluviatilis). Gran Dan, Gran Rio, Suriname, September.
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Willem Kolvoort / Podostemaceae river weed (Mourera fluviatilis) flower spikes above water, growing from a river-bed attachment. The flowering happens in the wet season. Gran Dan, Gran Rio, Suriname, September.
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Willem Kolvoort / Decayed leaf of Podostemaceae river weed (Mourera fluviatilis). Awadan rapids, Gran Rio, Suriname, September.
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Willem Kolvoort / Decayed leaf of Podostemaceae river weed (Mourera fluviatilis). Awadan rapids, Gran Rio, Suriname, September.
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Willem Kolvoort / Podostemaceae river weed (Mourera fluviatilis), close up of leaf structures. Awadan rapids, Gran Rio, Suriname, September.
