I tried to google it and everywhere else all I got were pics of Washu.
10 yrs ago you could find them, as I've seen them from tiem to tiem in anime/manga sites.
Washu's Crabs, have the distinctive black orbs for eyes & red bodies. They're just harder to find. Even the channel here has Washuu, but no crabs.
Seriously I was going to switch to that for my grav which is why I'm looking for it.