New addition -

Awsome addition, nice shots too.

 

Thanks a lot buddies! Do you know where I could find an info about the behavior of this fish?! It's amazing! Just few hours after addition it Mr "Grisom" started building a tunnel! It swims around the tank and collects different small pieces of my crushed coral sand, small grains are used for the floor of the cave, and the large ones are put around the entrance and on the surrounding LR! Fascinating! Are your gobies doing the same - use different sizes of crushed coral/aragonite ?!

 

is this one of the ones that gobbles up the sand and sivs it?? nice fish!

 

Yup! That's the one

 

Yea that is definitely a Diamond Watchman Goby I got one as well he was my second fish. I call him the architect because as I'm sure you've noticed by now he'll run around create tunnels and mountains of sand. He'll keep your sand well cleaned and aerated. Great choice