bleeding heart tetra swim fast, rio negro endemic fish side view, neon glow in blackwater biotope aquarium

adult amazonas animal aqua aquaculture aquascape aquatic barcelos bright business care characidae clear conditions controlled cultivation decorative demanding detail dof dot driftwood dwarf ecology ecosystem exotic farming fauna fish fishery fishkeeping free freshwater habitat hobby hyphessobrycon ichthyology instinct lifestyle low macro ornamental pet piaba project red relax shallow side socolofi space specimen tank threat tropical underwater vulnerable wildlife