Any idea about little bugs

[SAM755]

Hi all
Today I noticed a small bugs covered my wall of my tank and I never seen them before 2 years.
And I didn't add any thing in my reef tank since last year.
Please find the attached picture and let me know if it's safe or not.

 

[JGT]

Hi all
Today I noticed a small bugs covered my wall of my tank and I never seen them before 2 years.
And I didn't add any thing in my reef tank since last year.
Please find the attached picture and let me know if it's safe or not.

Look to be copepods. Good guys.. until your fish eat them. Then dead good guys.