The U in Uber must stand for Urchin.

[quesomuchacho]

I’ve got a clam that somehow got picked up by an urchin and has been uber-ing around the tank for the last week. Today, I noticed it’s ride-sharing with a xenia!

Obligatory: Clownfish say, “Hi!”

 

[Ron Reefman]

Most urchins will do this.

I collected a rock boring urchin last summer in the Florida Keys and it hasn't picked up anything. True, it hangs out under rocks way more than on top, but it's been a great tank mate.