bleeding heart tetra, popular ornamental blackwater fish from barcelos, rio negro, dominant male in bright spawning coloration

adult aggressive amazonas animal aqua aquaculture aquarium background barcelos biotope black blackwater bleeding breed bright characidae characin clear closeup coloration colorful decorative design dominant ecology endangered endemic fauna fish fishkeeping freshwater frightful habitat heart hobby hyphessobrycon instinct macro male nature negro ornamental piaba plant planted popular project protection red rio show smart socolofi spawning species tank tetra threat underwater vegetation vulnerable water wild