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The bluestreak cleaner wrasse is a tropical fish with beautiful, distinct markings and the adaptation that it makes a living on the reef or in a saltwater aquarium by eating the dead scales and parasites off the outside of the other fish in your tank. Some of my favorite underwater images are of a fearless Labroides dimidiatus searching for parasites inside the mouth of a much larger predator fish.
These fish are commonly available and are generally inexpensive in saltwater aquarium stores—but buyer beware, these beautiful saltwater fish have a notoriously difficult time adapting to aquarium conditions.
Bluestreak Cleaner Wrasse Quick Facts:
- Scientific Name: Labroides dimidiatus
- Common Names: Common Cleaner Wrasse
- Size: 3.9 inches to 5.5 inches
- Temperature: 78 Degrees
- Minimum tank Size: 75 Gallons
- Aggression Level: Low
- Color: White, Blue, & Black
- Care Level: Hard
- Most Active: During The Day
- Lifespan: About 4 years total lifespan, so factor in age at purchase and other factors for your own tank estimate
- Quick tip: Make sure your aquarium has a tight-fitting lid or netting around the side, or your cleaner wrasse will likely end up on the carpet
- Sexing: the bluestreak cleaner wrasse is a sequential hermaphrodite
Natural habitat
The Bluestreak cleaner wrasse inhabits all areas of coral reefs, including outer reefs and lagoons where it can quickly seek refuge from predators, from depths of 3 to 98 feet–can you imagine having a 98-foot deep aquarium? I’m imagining it now… that would be
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The reefs where the Bluestreak lives are found in Eastern Africa, The Red Sea, and even Japan and are plentiful in the wild (not endangered), which likely speaks to their relatively low retail price. The love warm waters with other docile saltwater fish that they can pick a meal off of. These are not shoaling fish, but rather form pairs or small groups (one male with a few females). These groups will set-up cleaning stations where they feed.
Proper Tank Conditions & Breed Behavior
The bluestreak cleaner wrasse doesn’t require any specifically challenging aquarium conditions, per se. Traditional reef aquarium water parameters are adequate and appropriate. The fishes are also relatively hardy, tolerant of water conditions, and like many other wrasse species, are bold, active swimmers that perform acrobatics in the water column, which is what endears them to the casual local fish store shopper. But the biggest challenge in successfully caring for them in your reef tank is to meet their nutritional requirements.
Labroides dimidiatus is a cleaner fish that generally struggles to acclimate to more traditional reef aquarium food. Because of that, most of these poor little guys (and gals) end up starving to death in our tanks. Properly caring for them, therefore, generally means having a tank large enough and stocked heavily enough (meaning lots of fish with loose scales, parasites, etc.,) for them to feed on and clean. While the bluestreak cleaner wrasse does require a moderate amount of room (aquarium size/volume) to be happy, because they are active swimmers themselves, the reason the recommended aquarium size is 110 gallons (or bigger) is because those tanks are generally stocked more heavily, with larger fish, which gives this beauty more of a fighting chance to survive.
You will need to make sure to have a secure lid on your tank as this breed of fish is known to jump out of the water with ease. These fish tend to enjoy all levels of the aquarium and never stay in one particular area for a long period of time. The are perpetual motion machines, much like the six line wrasse and other popular wrasse species.
There are no specific lighting or substrate requirements to keep this fish happy and healthy. As mentioned before, the most important care element is having enough food to eat.
Compatibility
The Bluestreak is a non-aggressive species of fish that is reef safe. I recognize that the statement reef safe may be offensive to those of you who are opposed to parasite cruelty (that can’t possibly be a real thing, can it?), but what I really mean by that is that it won’t eat your corals. This is a bit of a cynical thought here, but it would probably be better for the species if they did eat corals, rather than starve. But rest assured, your corals should be safe with this fish around. Marine ICH and other parasites are not safe around it.
Male bluestreak cleaner wrasses will generally show aggression towards each other–so they should generally be kept with only 1 male to a tank. That male can be paired with a single or multiple female fish. The species is a sequential hermaphrodite, which means that every fish posses the reproductive organs to be both male and female. If a male dies in a group, the largest or most dominant female will most likely become the male in the group.
These fish will then set up a cleaning station together where they will feed on resident fish.
Reproduction & Sexing
Breeding Bluestreak Cleaners is a tricky process for several reasons, but it has been done. It is nearly impossible to tell a female and male apart based on visual distinctions, but due to the fact that they are hermaphroditic, establishing a pair or harem shouldn’t be all that difficult, if starting with smaller specimens.
But if you recall the stated difficulties in keeping one cleaner wrasse alive, imagine now the complexities of keeping 2-4 alive (and well-fed).
When spawning, the male bluestreak cleaner wrasse will perform a mating dance to attract and stimulate the sexually mature females. The female will then lay eggs for the male to fertilize. It’s common for one male Bluestreak to breed with multiple females at a time. This fish most regularly mates around the afternoon hours. It’s important to note that breeding in captivity is rarely successful for this breed but it can happen.
Feeding
Feeding the Bluestreak Wrasse is unique and differs from other breeds commonly placed in tanks. Surprisingly, this is a carnivorous breed of fish who rely heavily on their environment to survive. The Bluestreak cleaner wrasse forms a symbiotic relationship with the fish in your tank. The Bluestreak will eat the dead skin and mucus build-up off your fish. They will also eat any parasites that appear in the tank on your other fish. Of course, there’s only so much skin a fish can shed, and parasites SHOULDN’T be present, which is why most of them starve to death in captivity.
A few blue streaks have been reported to eat meaty food such a shrimp, but for the most part, sustaining the diet of these fish is extremely challenging.
Where To Buy
This is a popular species that is often available at local fish stores and online retailers like LiveAquaria.com and Saltwaterfish.com. Before buying this breed of fish, you will want to inquire about how long they have had it, what they have been feeding it and to ask to see it fed. This fragile species should only be bought from reputable pet shops that closely monitor the health of their fish.
Whether to Buy Bluestreak Cleaner Wrasse or Not
Hopefully, at this point in the article, you get it that this is an amazing fish. They are gorgeous, full of energy and so fun to watch. But please balance this with the understanding that they are notoriously challenging to keep alive. If you have a very large saltwater aquarium stocked (relatively) heavily with large-bodied fish, like some of the larger tangs, angelfish, etc., you may have a chance. If not, it is probably not an ethical or smart choice to bring this fish home from the store.
If you’re considering this fish as a short-term solution to an imminent saltwater ICH infestation, also consider that the wrasse itself is not immune from ICH and may succumb to an infection.
Quarantine with hypo salinity and/or copper treatments are really the only way to rid yourself of ICH.
Other more suitable cleaner species
If you are interested in watching the cleaner-behavior in your tank, there are two options that are much more suitable for more reef tank environments.
Check out these other cleaner species instead:
Or consider the close-cousin captive bred hawaiian cleaner wrasses
Learn more about the bluestreak cleaner wrasse
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