leopard pleco from amazon basin, armored catfish, helpful freshwater algae eater, popular fish species rest on gravel bottom

acidic adaptable algae amazon america animal aquadesign aquascape aquatic aquatrade armored background balance basin biological biotic bottom bottomdweller business catfish clear conditions controlled dark decorative diversity dof eater ecology ecosystem fauna fish fishkeeping free freshwater gibbiceps granite gravel habitat headshot helpful hobby ichthyology instinct leaf leopard loricariidae macro natural nature nocturnal orinoco ornamental pet plant planted pleco popular protection pterygoplichthys rest shallow south space species specimen stream suckermouth tank tannin underwater valuable water widespread