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FAQs about Balistapus Triggerfishes 2

Related FAQs: Balistapus 1, Undulatus Identification, Undulatus Behavior, Undulatus Compatibility, Undulatus Selection, Undulatus Systems, Undulatus Feeding, Undulatus Systems, Undulatus Disease, Undulatus Reproduction, Triggerfishes in General, Triggerfish: Identification, Selection, Selection 2, Compatibility, Behavior, Systems, Feeding, Diseases, Triggerfish Health 2, Reproduction,

Related Articles: Triggerfish, Balistapus Species, Red Sea Triggerfishes


Triggerfishes for  Marine Aquariums

Diversity, Selection & Care
New eBook on Amazon: Available here
New Print Book on Create Space: Available here

by Robert (Bob) Fenner

Undulate Triggerfish; comp.     7/29/17
Hello, this is Kim. I have a 125 gallon with a juv. Snowflake Eel (over a foot long, 1" diameter) and a Neon Velvet Damselfish (around 2-3"). My friend gave me a 3" Undulate Triggerfish. Would these fish get along?
<Mmm; hard to guess. Starting this small, this Balistid might; but Balistapus undulatus can be a real terror. >
I'm expecting the Damselfish and Triggerfish to fight, however, I am hoping that the Triggerfish doesn't harm the eel. A lot of macroalgae and live rocks to hopefully create territory. Thank you.
<Again, the cost of "liberty", constant vigilance. By the time your Undulated gets bigger, bitier, it may well be too late for the Damsel, and perhaps the Moray. Short answer, I would not mix it in here. Bob Fenner>
Re: Undulate Triggerfish     7/29/17

P.S. the Undulate Triggerfish is a female if that makes a difference. I don't know if it is from the Red Sea though.
<... am curious as to what makes you think you can sex this fish. Some Triggerfishes (Genus Xanthichthys) are sexually dichromatic... but not this species, when small or large. Bob Fenner>
Re: Undulate Triggerfish     7/29/17

Males have a bald patch on top of their snout, while females have stripes throughout.
<Really? Thank you for this. Will look for in specimens I encounter>
However, thanks for the answer. It's a shame how aggressive these beautiful fish are.
<Agreed... some are worse... The Clown, Queen, Titan... and they get MUCH larger>
I was really hoping that I can at least keep it with the Snowflake Eel. Damselfish, however, was probably a stupid idea. I was hoping that the damsel would be scrappy and hold on it's own. Never thought a fish would pick on an eel though.
<Many do simply to "sample" autistically... bad for the bitee. BobF>

Undulated Trigger Hi, I have read about the rogue (Balistapus undulatus, or the undulated trigger).  I would like what is the minimum tank size for 1 of these without other fish, corals and invertebrates. Will use LR, Seio M620.  <Since you've read about them, then you are aware they can grow up to one foot in a closed system. Keeping it alone, I would go with no smaller than a 70 for starters. James (Salty Dog)> 

Trigger Tank Size (5/15/05) 70 gallons I suppose? If that is the case. I have to return to the LFS. Thanks  <An Undulated Trigger (or any other fish that attains a foot or more in length) really ought to be in a tank of six feet or longer. The minimum size I'd suggest for an adult is 120 gallons. That said, Triggers are fairly slow growing fish, so I could be OK in 75 Gallons or so for a few years. Hope this helps, Steve Allen.> 

- Undulated Trigger Colors - Hello I was just wondering if you could tell me if there is any visual difference between an undulated trigger from the Red Sea as opposed to one from the Indian ocean.  <Hmm... have seen color differentiation in these - typically in the stripes, from yellow to red to orange, but not consistently based on their geographic origin and even then can vary depending on the mood of the trigger. Would expect both Red Sea and Indian Ocean Undulated triggers to have more reddish-orange stripes. Cheers, J -- > 

Undulated Trigger - When Will it Get Aggressive? Hello, I got a 3 or 4 inch undulated trigger about a week ago and was just wondering why he hides all the time. From what I hear they are supposed to be really mean and not shy. He is the only fish in my 55 gallon tank. It used to be a reef and still have some shrooms, snails and crabs in there and he hasn't even acknowledged that that stuff is in there. When I drop a silverside in there he swims out of his cave grabs the fish and eats it in his cave. Just wondering if I got a shy one or if it just takes some time for him to not be so shy. Oh and by the way my water is perfect and he is not breathing hard at all.  <Patience Doug, the name of the game. He's eating, good. I haven't saw my watchman goby until about a week and a half after I got him. James (Salty Dog)> 

Undulated Trigger Fish Shows No "Mean" - II Thanks for the fast reply!! Just hope that he doesn't turn out to be a shy fish because I gave up a lot of neat "reef" fish because I wanted an aggressive tank. I talked to one guy at my live fish store and he said that undulateds are known for hiding and being shy when first introduced into the home aquarium. Have you ever heard that about them? If so do you have any idea on how long this will take? I am trying to be as patient as I can. <Doug, I've never heard of them being shy. They are as mean as a mother-in-law on a bad visit, probably the most aggressive of all triggers. James (Salty Dog)>

Undulatus - Justin's Take - IIa Thanks for the fast reply!! <Justin Here> Just hope that he doesn't turn out to be a shy fish because I gave up a lot of neat "reef" fish because I wanted an aggressive tank. I talked to one guy at my live fish store and he said that undulated's are known for hiding and being shy when first introduced into the home aquarium.  <This depends entirely on the personality of the fish. I have personally been bitten, smacked and even scratched by one very small 1.5" undulated trigger while trying to feed and later catch it. I have also seen the same fish take 6-8" groupers head on for food and space and win, as well as most other aggressive fish in its tank. I definitely rate them in the trigger family in the middle to the top as far as possibility for aggression.>  Have you ever heard that about them? If so do you have any idea on how long this will take? <Find one that is very active and after he/she is acclimated then you will see them become the ruler of the tank as long as a more aggressive fish isn't apparent. Mostly Females are more cranky then their male counterparts, though I do not know how to sex them, I've just seen a female birthing in a tank then a few weeks later after removing the mother to a new tank, watching it chase everything out of the tank including the divers.>  I am trying to be as patient as I can.  <Don't worry this fish can be a holy terror at times if provoked. A great aggressive tank fish, though don't mix with other triggers usually, or anything that isn't as aggressive as it, and add it last to your tank as it will pick on any new arrivals to the tank.> thanks again <Justin (Jager)> 

Dedicated Undulated trigger keeper A few questions for you if you would be so kind. I've been keeping fish for a very long time, and for years I've been toying with the idea of a dedicated undulatus tank. I had one for about 15 minutes, years ago. He was 3", and 30 seconds after hitting the water in the tank he proceeded to attack a 16" Queensland grouper. :) They are one of my favorite fish of all time, so I'm thinking of finally giving up some space to keep one. Anyway, this tank will be a dedicated 120 gallon.   My questions are as follows 1. How would you characterize their growth rate? Ultra slow like a Huma Huma? Or faster like a clown? Faster still like a niger? <More like a Humu or other "Lagoon" trigger... slow and steady> 2.  Are they sexually dimorphic? Do the males or females get larger? <Not sexually dimorphic, though I swear they are dichromic when larger, in good health... males are more "bright", and for specimens further into the Indian Ocean, Red Sea, more colorfully marked> 3. I'm looking for a Red Sea specimen, what are the telling chromatic differences between that and the other localities? <Much lighter in body color and the red vermiculations on the head much more prominent and wavy... especially under the jaw> Thanks for any help. I don't want to purchase a 3" specimen, and 2 years later only have a 5" specimen. I want a nice show animal in a few years. (Just because I'm an "expert" doesn't mean I'm always patient) If they are slow growers I'll be sure and start with at least a 5" individual. I've been doing my best to help out on your site, answering what questions I can. Great site! I've been keeping marine aquaria for 20 years, and I enjoy educating others on the subject. It feels oddly nice to ASK a question, I don't get to very often. :) <Do you have time to respond to queries here? Interest? Bob Fenner>

More on undulated trigger, helping on WWM Thanks so much for the reply Bob! Hmmm...Huma Huma growth speed. In my experience you're lucky to have a 7" Huma Huma in 5 or 6 years if you start with a little guy. While I count that as a big plus for that fish when a keeper wants to put one in a 55 gallon tank, it stinks for the person with space wanting a show fish. :) Looks like I need a 5" Red Sea male undulatus. I forget off the top of my head, are the males the ones with or without stripes on the snout? <With... at least with more> Would this difference be apparent already in a 5" fish? <Should be, yes> I definitely have time, and would be interested in answering queries on your site. :) I'm a dyed in the wool fish geek. I can also answer freshwater questions, as I spent years keeping and breeding African, Central and South American cichlids. <Ahh! Would you please send a brief bio... something I can share with the existing WWM Crew, post for the public, re your experiences, abilities and desires? Thank you for your interest. Bob Fenner> Cheers
Jim


Triggerfishes for  Marine Aquariums

Diversity, Selection & Care
New eBook on Amazon: Available here
New Print Book on Create Space: Available here

by Robert (Bob) Fenner

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