they are a pretty cool fish but they get to be the size of a trout and will swallow anything that moves that will fit in their mouth and I mean anything.
wow those guys are unique and cool looking. I imagine theywould be somewhat hard to get in(except for me, know the right people). Any idea what they normally run?
I had a few BBG with in my other fish. I had no problem with them getting eaten. Not even my tiger fish would eat them. The BBG hung all around my tiger. Most of them weren't fast enough to get the food and I think my Wasp fish tried one or two. But most of the time I had to "hand feed", by taking brine shrimp and letting it float down a tube to the BBG. Then usually my F8P would come in and take the food away.
Knight Gobies and BBG's will be fine together. BBG's have a toxic slime coating which prevents them from getting eaten by most things. Neither goby is aggressive so both will be fine. Good luck if you decide to go with them.