the amur bitterling (rhodeus sericeus) is a small fish of the carp family on the background of a 5 mm measurement grid

animal fish seafood underwater aquarium food reef wildlife cuisine invertebrate dish bird wing reptile pet mammal tail male colorful silver scales raw catch fin amur behaviour european bitterling mollusc tranquil aqua amarus endemic rhodeus acheilognathinae temperate fishing fresh fauna life freshwater tank water carp aquatic lake wild hobby pond mussel pollution summer ecology europe green nature scuba environment sericeus small family background measurement grid ichthyology research