critters in my new tank

[shale4912]

i am setting up a 75 gallon saltwater tank. i have advanced to the point i am adding live rock. i also have live sand. i purchased 20 pounds of live rock, a few days later, i added 23 pounds. in the second batch. A day later, I saw a bumblebee snail and what looks like little bugs running on the live rock. What in the world are the "little bugs"? Do I need to get rid of them or are they ok?

[tjigger]

If you could add a pic of them...but no need to worry the "lil bugs" will be great food when you add fish.