fight for territory of bleeding heart tetra males, show neon glowing spawning colors, rio negro endemic in driftwood style biotope

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