Need some help

[The Grizz]

Have you checked behind and under your stand, that is where I found my orange spot goby a few weeks ago after having it for 6 month or more.

The bug could be pods?

[mark1187]

there is few tunnels under the rocks.. ive checked all over the floors and couldnt find anything..

The thing that looked like a bug also looked like a super small shrimp

Sorry im pretty new to the salt tanks

[abcha0s]

The bug would most likely be a "pod". Copepod or amphipod. Most are benifical and desirable. Watch out for Cirolanid isopods. Although rare, they eat living fish.