juvenile freshwater fish chinese sleeper, perccottus glenii, resting on driftwood in biotope aquarium, closeup

adaptable amur animal aqua aquarium aquatic asia asian biotope bug chinese clear closeup colourful decorative driftwood east ecology eurasia eye far fauna fin fish fishkeeping freshwater glenii gray green grey hobby invasive juvenile line lips live local macro male marine mouth natural nature odontobutidae perccottus photo predator resting river rotan sleeper southern squama tank underwater water weed widespread wild