Move my hitchhiker or keep him where he is?

Found a little hitchhiker! That is my pinky fingernail for reference, he’s just a baby! He’s in Big Bertha, my 20gal hexagon top fin tank. Must’ve come with the plants I put in a few days ago. Did some water parameter testing the other day and Bertha is cycled.

Wondering if I should leave him in this tank for now where there are no predators? Other tank I have is a cycled 6 gallon tank but I have a red claw crab, who seems to be fine with my large snails but I worry about this small one. It’s also heavily decorated so I’m sure I would lose track of where he is.

Leave him be, or move him?