fight for territory of strong adult males of bleeding heart tetra, typical blackwater characin fish behaviour, blackwater biotope

adult amazonas animal aqua aquarium aquascape aquatic barcelos basin behaviour biotope blackwater bleeding bright business care characidae characin clear cultivation cute decorative design dot driftwood dwarf eco ecology endemic fauna fight fin fish fishkeeping freshwater habitat heart hobby hyphessobrycon instinct little live low macro male males natural nature negro ornamental pet piaba project red rio side socolofi species strong tank territory tetra threat typical underwater water