IMOP sand sifting gobies are a pain. They will cover your rock and any coral in your tank. There are many more, better, choices. Again my opinion
Okay. Randall goby looks cool. Do these guys graze on algae at all? Dig in the sand? Hide a lot?
No, they do not graze on algae though mine will grab some pieces of algae that float when my foxface is ripping some apart lol. My Randall is paired up with a tiger pistol, they are both out a lot and visible in front of their multiple den openings. They are out a lot more than my yellow watchman goby and candy cane pistol. I love the relationship so to me I will always have at least one pair in my tank.
My favorite goby, though I haven't seen them for sale for some time...
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