Uurt you can'r imagine I purchased this live rock from Triton marine in Tampa area they let me hand pick it from their tanks, When I got back to North Georgia 7 hours leter I found in the rock. 2 viper morays, 10 brittle stars, 2 fire worms, 1 scooter blemy, 2 shrimp, 6 turbo snails, 1 flame scallop, as well as several other live and well mollusks. As much life in the rock as on it!