What is this creature??

[Giancarlo_Flex]

So Ive had my tank for 5 months
2 clowns, 3 corals, 1 cleaner shrimp, 5 snails/hermit. Today i just saw this. What is this??? Should I be worried?

 

[anemonalex]

So Ive had my tank for 5 months
2 clowns, 3 corals, 1 cleaner shrimp, 5 snails/hermit. Today i just saw this. What is this??? Should I be worried?

How's this look?

amphipods - (Crustacea: Amphipoda)

 

[EeyoreIsMySpiritAnimal]

Common amphipod

 

[xWascallyWabbit]

Yep. Amphipod. Great cleanup crew. It's a keeper