How do I know if a Cajun dwarf crayfish is in distress? Several were added to ten gallon tank. Out of six , two are behaving quite different. Mainly the larger one. What r signs of distress? Tank is cycled. No amonia present. Everyone else seems mellow. All were drip acclimated over a 4 hour period. I'm new to this but very nervous about odd behavior. Please help!