Cleaners Wrasses aren't the only cleaners out there guys and gals... if you want a cleaner that has a good chance of survival, that is...
There's the Sharknose Goby,
Elacatinus evelynae (syn. Gobiosoma evelynae, Gobiosoma genie). He gets to about 2" max, tiny by any standards, but there are good accounts of them cleaning much larger predators... one cleaning a trumpetfish
http://www.reefnews.com/reefnews/new.../trptgby2.html and a moray eel
http://www.reefnews.com/reefnews/new...03/gmoray.html, though these accounts are probably (circumstantial) at best. I did read somewhere that they are known to clean fishes from 1.5 to 15 times their size.
Might be worth a try for some people, if you really wanted a cleaner type fish. I'm pretty sure I came across another also, if I can find the page I'll edit this post.