Pictured in this week’s AquaNerd POTW is a Rainford’s Goby (Amblygobius Rainfordi) swimming among a group of Ricordea mushrooms and Zoanthids. This fish has been fairly common in the aquarium trade for many years, but you hardly see them in anyone’s tank. I actually find them to be a great addition to any community tank and they look great, despite how common and inexpensive these fish actually are. The Rainford’s goby is also a great aquarium cleaner, as it sifts sand for tiny organisms and eats various algae right off the rocks. They reach a maximum length of only a couple of inches, which makes them a good candidate for nano aquariums and large aquariums alike.