community fish fisherman fishing island net aquarium-fish artificial breeders breeding colorful colors colourful colours common community-fish differences freshwater-aquarium-species guppies guppy guppy-strains hardy jar live-bearing-species millionfish pattern-variations patterns peaceful plastic-vegetation poecilia-reticulata popular rainbow-fish shapes Sizes small-size species tank-water temporary-container tropical-fish variable-food-preference variations variety widely-distributed dried dry food Preserved seafood sun