they said pistol goby pair. That means a pistol and a goby...They can - Again, these fish can thrive without shrimp. they DO NOT need sand burrows. You’re thinking of the Cryptocentrus genus that needs that. Not all Cryptocentrus gobies pair so it’s always better to go with Stonogobiops gobies.
My yasha doesn’t care about not having a shrimp and definitely doesn’t use the sand - He uses it to perch on but rarely to make a burrow. My S. yasha hid in a deep rock hole for a year when it went into my first tank. Now in this tank it hides in the rocks again (Another year went by of him doing this).



