I have the brown, yellow and green clown gobys, and of them all I htink the green is the shyest. Its hard to see its eyes as they blend right in with the stripe they are located in.......My green stays in a toadstool leather, the yellow likes to stay perched on the top of the heater, and the brown likes to lay on the shrooms.....I feed mine brine shrimp, both frozen as well as freshly hatched, and mysid. I also feed em hikari S pellets.....They are a good sized fish for pico tanks.