What is this bug?

[CJL]

I've been following this forum for a couple of years, but never posted before. Today when I did my water change, I found several of these black bugs crawling on the filter socks in the sump. Is this a copepod (didn't think they were black) or something more nefarious? Thanks for any help.

 

[MERKEY]

Looks like an amphipod....and yes they do get dark.

 

[AydenLincoln]

Agreed with an amphipod a good guy!

 

[CJL]

Great! Thanks so much for your help!