Of the three Australian commercial crays, the red claw grows the largest & fastest and is the least aggressive towards its own. You can pack them 4 to the square foot without problems. They do need hides, but so far I've seen no issues. They need to be kept away from any fish that might view them as a meal. They walk right over each other without making any sort of aggressive response. The males are really stunning. I'm hoping they will get a little bluer.

Easy & cheap to feed. Mostly alfalfa pellets supplemented with sinking feed 30% protein.