my fw asian tiger lobster (3-4 inches) lives in a 40 gallon tank with a fw moray eel and 8 zebra danios. i separated the eel and lobster from each other with a divider about 2 days ago..anyways..since yesterday night, my lobster's claws have become dark blue and around half of the body changed from a reddish to a blue..could this be a sign of stress or sickness? help please