NEW Critters Unknown Animals

[Westfield]

I have a coral only 10 gallon tank, 5 SPS, 1 Kenya Tree, 4 snails and 3 hermit crabs. And never (knowingly) purchased anything else
Today in the dark I was using flash light
I saw 2-3 little transparent like fast critters which ran and hid from the light
They kinda looked like shrimp?
But my guess are small hermit crabs
Any Ideas
Thanks John

 

[Chinamom]

amphipods