Thanks! SKB, they are Victorian cichlid fry called the Mbipia Cf. Lutea "Yala Swamp." And i also love texas holey rock, but sadly, being a high school student with no job and 2 other tanks, i just don't have it in my budget! And Dwayne.Aycock, i've had this tank for awhile and i've had some bad experiences with fish digging (one got crushed by a rock), so i know where you're coming from! So now i but the rock on my egg crate and place the substrate around it.