bleeding heart tetra dominant male show aggressive spawning behaviour, rio negro endemic fish, neon glow in blackwater

adult amazonas animal aqua 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