Purple LobsterHow to Care for Purple Lobster written by Dave Burr Provide the Purple Lobster with a deep sand bed and numerous rocks where it can construct its burrow. A hiding place is especially important after molting when the lobster must wait for its new exoskeleton to harden. Constructing a cave near the front of the aquarium will improve your chances of seeing the lobster during the day as it will spend most of the daylight hours hiding in its burrow.