metynnis, betta fish in plastic pouch, bright young malawi mbuna cichlid, artificial hobby breed of wild ornamental species

metynnis argenteus serrasalmidae silver dollar betta splendens siamese fighting fish unnatural juvenile colorful glofish cichlidae popular smart freshwater fauna creature swim water clear aqua petshop pet shop animal hobby species aquaculture fishkeeping business trade underwater decorative tank macro little instinct habitat ecology vulnerable overcrowded specimen market threat protection ichthyology outdoor controlled conditions phlegmatic aggressive friendly plastic pouch bright young malawi mbuna cichlid artificial breed wild ornamental beginner aquarist commercial stand showcase aquarium