The common goldfish (Carassius auratus) is effortlessly many of the first actual fish species to be saved via people as a puppy. If there's an aquarium species deserving of the title "the human being's fish," this is the one.While rankings of domesticated types, evolved by way of notably committed breeders, have emerged over the last 10 centuries or so, the iconic goldfish remains immediately recognizable even to those who've in no way owned an aquarium...