My hitch hiker

Pretty sure he's been ID as a species of decorator crab, Schizophrys aspera
Day I brought him home, March 27.

Now a molt I placed in the same cup on June 17, he's growing fast.

June 19, notice some small pieces of halimedia he's carrying on his back(between his eyes) and he always has some sponge material on his back that's there with every molt(even though there's no sponge in the tank).

underside

videos:
silly crab follows the camera.

and again, reaching for the camera, surprised he didn't fall.
