They are very cool fish. Can't really house them with anything aggressive, and sometimes even in communities, require spot-feeding. They are practically blind, pretty much mainly filter feeders. Get up to 18-24" but grow slowly. I started mine off in a 40gal, then upgraded to a 75, but it wasn't getting enough food so I moved it to a hospital tank. Its been fattening up nicely, and is about ready to go back into the main tank. They like to hide under things, so make sure you have lots of structure. Sand substrate is good, as they will sift it. I actually got mine by accident, someone had ordered a polypterus and they sent the goby instead so I grabbed it. I had mine in with some BBGs, a mudskipper and some mollies.