Had to share this story..

[GOSKN5]

About 2 months ago I ordered a red snapping shrimp and a high fin goby.. not a "pair" just one of each..

They arrived and we're TINY.. like thumbnail size... after and few days they found each other and lived under a rock... until one night a few weeks ago the shrimp somehow got into the overflow... I run a sponge filter and the overflow is on other side of tank.. tough journey... I added a little sand and just left him there... the goby stayed in same rock for the next 3 weeks or so...

I hadn't seen the goby in several days and happened to look in the overflow at the shrimp... sure enough the goby is now living in the overflow with the shrimp!

These little guys traveled about 3 feet across the tank.. up 16" to the top of the overflow, past a sponge filter to live together haha... just wanted to share... I will try to get a pic if I can...

 

[Maximus]

They were meant to be together

 

[Betta132]

Aww! The goby probably heard the shrimp clicking and wanted to get there to be safe.
You may need to keep them in a nano tank, they're easier to see in small areas. Or, actually, you could just add a bit more sand and let them live in the overflow permanently.