I bought him incredibly small maybe 2 inches? It was my first fish ever lol but yeah mine seems to love burrowing under drift wood I had some caves he never really went into them but I plan to get some larger diameter tubing and run in through the sand or something to that affect and hope he likes it.. I have noticed recently he's been getting more bold and begging for food daily so I'm expecting for a growth spurt soon especially when my shrimp breeding kicks off and I can feed him gut loaded shrimp