danube crayfish female rest on twig in planted coldwater biotope aquarium, wildcaught domesticated highly adaptable species

adaptable antenna appendage aquaculture aquadesign aquarium astacidae astacus behaviour big biodiversity biotope captive claw clearwater closeup coldwater conditions controlled crayfish crustacean cultivation danube decapod design destructive disorder domesticated driftwood ecology ecosystem edible environment exoskeleton fauna female freshwater gravel habitat hardscape harmful highly inhabitant instinct invasive leaf leptodactylus litter narrowclawed nature necrophage nocturnal omnivore organic pereiopod planted pollution predator rest river rostrum sandbed space species substrate telson temperate threat turkish twig underwater unusual vegetation water weed widespread wildcaught wildlife