narrow-clawed crayfish eat dinner on sand substrate in planted biotope aquarium, wild caught domesticated freshwater species

antenna appendage aquaculture aquadesign astacidae astacus behaviour biodiversity captive clearwater closeup conditions controlled crayfish crustacean cultivation danube decapod destructive driftwood ecology ecosystem edible environment exoskeleton fauna free habitat hardscape harmful instinct leptodactylus molt nature necrophage nocturnal omnivore organic periopod pollution predator rostrum sandbed space tasty telson temperate threat turkish underwater unusual vegetation water weed widespread wildlife