I placed an order with LiveAquaria and he, with 3 trapezia crabs and 1 unknown shrimp were all hosting my the bird's nest I received. I kept the crabs and shrimp, but I wasn't sure about the goby. He looks very similar to the yellow goby below, and is about the size of a nickel. Does anyone know if certain gobies will host in a bird's nest? He seemed very at home inside when I pulled him out, so I don't mind putting him in if I need to (though this tank is coral only).
Also, anybody know about certain shrimp hosting in bird's nest? He's really small and 99% of the time I can barely see him, but he stays nested in the coral 100% of the time.
And last, I hear a knocking noise in my coral only tank all the time now with the introduction of this bird's nest with it's 4+ creatures living in it. It sounds like something is tapping or knocking on the SPS with a metal butter knife... like a hollow echo. Any one know what this could be?