Purchased copepods online but shipping was late 4 days. They were shipped on wet filter floss. I put them in 2 gallon tank but see no movement. Am I still able to feed them?
If you see no movement after the first few minutes from any of them then they are all dead. The moment you start to acclimate them they should "wake up" but judging by the 4 day shipping, im pretty sure they are dead if you already arent seeing movement.
I agree they look like (dead) amphipods. If they are, and that big you would instantly be able to tell if they are alive. What species were they supposed to be? Even most if not all copepods you should at least be able to see moving specs.