[untamed]

Originally Posted by argan

It looks like the gorgonians on that rock contracted the gobies to build them a wall around their property. :P

I have a couple of non-fishy friends that drop by regularly to see the tank and they thought I built the mound myself. They couldn't believe that the fish did it in only a few days.

They build so fast that they buried a large snail. When the snail decided to move out, it caused a collapse near their entrance. It was really amazing to watch them set about to repair it because they carefully selected large objects to fill the hole. The larger one grabbed a very large rock from some ways away and dropped it directly over the hole. The smaller one then manipulated that rock to test fit it a few different ways before they moved on to bury that rock with additional small rubble.

Another entertaining few minutes at the tank!