Second time I have seen CPD mention cleaner wrasses as a no-no. Not that I am doubting you, but can you please provide more information on your statement? I have google searched and only see other people on forums repeat what your saying, that they should be left in the ocean and have a low survival rate in an aquarium, but I don't see any real data backing that up. Kind of like when people say don't ever use an aquarium that was treated with copper, complete myth if you wash/rinse the tank out good.
Reason I ask is I have had a cleaner wrasse for some time now, and it gets VERY fat at feeding, eats like a pig off of Rod's food. Sometimes I think its belly is going to pop it gets that big. The wrasse did clean a very small bout of ich off my angel but it was just a few spots when first introduced. The cleaner wrasse made quick work of it and haven't seen a sign of normal ich since the first few days the angel was added. There are about 20 people in my reefclub that have cleaner wrasses in their tanks and I have not heard of anyone losing one. Some club members have had theirs over 3+ years, one actually has had his for over 5 years.
Now.. back on the topic of Scientific names.. which cleaner wrasse are you referring to because I have seen quite a few different fish called a cleaner wrasse, some definately do not last at all in an aquarium, but it seems the one I and local reef club members have are quite hardy in an aquarium and will eat both frozen (rods, brine, mysis, spirulina) as well as nori with a passion.
Here is the wrasse I am talking about.. is this the same one your thinking of CPD?