Do shrimp eat parasites off of fish?

Research indicates that cleaner shrimp do not eat parasites. In actuality fish enjoy being cleaned because it feels good. ...
The first statement is clearly false.
And the idea that fish get cleaned for the feel good effect - seriously? The fish may get a good feeling out of it but what would be the shrimps motivation to do it?


The issue is whether cleaners (shrimp or wrasses) have any effect on preventing ich, velvet, brook, uronema since most people employ them thinking that they help. Do you really want to argue that they do? Or have people think they do? I am not going back into Google Scholar to dredge up the research on stomach contents assays but if it floats your boat, go for it.

I think I stated that they don't remove ich, velvet, brook and the like.
First of all these diseases are exceptionally rare in the wild, at least at levels that would give a shrimp a meal. And then most of these parasites are so small that the shrimp has no chance to pick them off the fish with any efficiency.

The parasites the shrimp is proven to remove are the ones most common in the wild: parasitic crustacean and worms that are on the skin and in the gills.
 
The first statement is clearly false.
And the idea that fish get cleaned for the feel good effect - seriously? The fish may get a good feeling out of it but what would be the shrimps motivation to do it?

food source


I think I stated that they don't remove ich, velvet, brook and the like.
First of all these diseases are exceptionally rare in the wild, at least at levels that would give a shrimp a meal. And then most of these parasites are so small that the shrimp has no chance to pick them off the fish with any efficiency.

The parasites the shrimp is proven to remove are the ones most common in the wild: parasitic crustacean and worms that are on the skin and in the gills.

Pretty sure no one was disagreeing about what the do in the wild, the issue is the false hope they provide in the home setting for ich and velvet in particular
 
Pretty sure no one was disagreeing about what the do in the wild, the issue is the false hope they provide in the home setting for ich and velvet in particular

Exactly. However if you wish to employ Google Scholar you will find that the fish do seek out cleaning behavior because it "feels good" and the shrimp do get something out of it, that is "dead skin". Parasites found commonly in the wild are uncommonly found in the aquarium and this is an aquarium focused board so anything that encourages aquarists to buy cleaner wrasses or cleaner shrimp for the purpose of solving a problem occurring from lack of quarantine needs to be challenged. If you actually read the initial posters question it had to do with solving his ich problem with cleaners.

My focus here is not marine biology research papers (despite being rather well read; I recommend Steven Spotte's book, Captive Seawater Fishes: Science and Technology) and I know pretty well what they do in the wild having spent about 3000 hours photographing fish behavior in the wild.
 
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Don't put a cleaner fish or shrimp into a tank that is too small to let fish get entirely away from the cleaner. Overmuch zeal from the cleaner and inability of the fish to move away can do damage.
 
Don't put a cleaner fish or shrimp into a tank that is too small to let fish get entirely away from the cleaner. Overmuch zeal from the cleaner and inability of the fish to move away can do damage.

I agree. There are also some fish that do not want to be cleaned. Ever. And these fish can go a bit bonkers in a smallish tank where they perceive they are being harassed by a cleaner.
 
Exactly. However if you wish to employ Google Scholar you will find that the fish do seek out cleaning behavior because it "feels good" and the shrimp do get something out of it, that is "dead skin". Parasites found commonly in the wild are uncommonly found in the aquarium and this is an aquarium focused board so anything that encourages aquarists to buy cleaner wrasses or cleaner shrimp for the purpose of solving a problem occurring from lack of quarantine needs to be challenged. If you actually read the initial posters question it had to do with solving his ich problem with cleaners.

My focus here is not marine biology research papers (despite being rather well read; I recommend Steven Spotte's book, Captive Seawater Fishes: Science and Technology) and I know pretty well what they do in the wild having spent about 3000 hours photographing fish behavior in the wild.

You are failing to account for the affects of having damaged or dead scales on a fish, as research has shown that these make a fish more susceptible to parasites and disease.

As for the "good" feeling fish get, this has repeatedly been shown to reduce cortisol levels, which in turn strengthens about every aspect of fish health, especially it's immune system.

Add to that the fact that research consistently shows that fish that have access to a cleaner are in significant better health than those that do not have access.

They are not a cure-all for disease and parasites, but they most certainly can help maintain fish health, speed up recovery of sick fish and reduce susceptibility to future infection.
 
You are failing to account for the affects of having damaged or dead scales on a fish, as research has shown that these make a fish more susceptible to parasites and disease.

As for the "good" feeling fish get, this has repeatedly been shown to reduce cortisol levels, which in turn strengthens about every aspect of fish health, especially it's immune system.

Add to that the fact that research consistently shows that fish that have access to a cleaner are in significant better health than those that do not have access.

They are not a cure-all for disease and parasites, but they most certainly can help maintain fish health, speed up recovery of sick fish and reduce susceptibility to future infection.

I agree with all of the above, and I seem to recall the cortisol study in my original answer 7 years ago. That does not change the fact that the OP seven years ago was trying to solve his potential ich problem using cleaners. Would you really have advocated a cleaner to solve the OP's issue? Seriously? Do you really want to encourage the average reader of this forum to use cleaners to prevent parasite issues? If your answer to any of those questions is yes, we have to agree to disagree.
 
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My problem with cleaner shrimp is after a year they would rather steal food from my corals than clean fish.
 
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