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Don't know anything about killis but started to search for some that would stay small enough. Found the following genera on the killi.net where the maximum length was given. I chose those genera all the species of which stay under 4.5 cm (ca. 1.8'') - but there surely are other genera with species small enough for our nanos and even picos!

Adamas AF
Aphyoplatys AF
Campellolebias SA
Congopanchax AF
Cynopoecilus SA
Diapteron AF
Fluviphylax AF
Foerschichthys AF
Fundulosoma AF
Yucatan flagfish Garmanella pulchra CA
Leptolucania NA
Catarina Pupfish Megupsilon aporus CA (Mexico)
Micropanchax AF
Pantanodon AF
Plesiolebias
Stenolebias SA
Terranatos SA
Tomeurus SA

[AF = Africa, SA = South America, CA = Central America, NA = North America]
 

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jhoetzl said:
Corydoras hastatus and pygmaeus are cool.
I personally like habrosus for a nano (>=5g thought), followed by pygmaeus.
So far C. habrosus is one of my favourite fish. These guys have a lot of spunk and are not in the least bit shy (at least in my experience).
 

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Remembered that I have a list of livebearers with their sizes! :) So compiled this list of those small enough (IMHO, < 4,5 cm, 1.8'') and of which there are registered populations kept.

Allotoca zacapuensis CA (Mexico)

*Barred Livebearer [Fishbase], Banded Widow, Stuart's Livebearer (Carlhubbsia stuarti) CA (Guatemala)
*Carnegie's Millionsfish/Livebearer, Ten-Spotted Live Bearer (Cnesterodon carnegiei) SA
Cnesterodon decemmaculatus SA
Gambusia alvarezi CA (Mexico)
Gambusia atrora CA (Mexico)
Gambusia aurata CA (Mexico)
Gambusia eurystoma CA (Mexico)
*Big Bend Gambusia (Gambusia gaigei) NA
Gambusia geiseri NA
Gambusia heterochir NA
Gambusia hurtadoi CA (Mexico)
Gambusia lemaitrei SA
Gambusia luma CA
Gambusia milleri
Gambusia nicaraguensis CA
Gambusia rachowi CA (Mexico)
Gambusia regani CA (Mexico)
*Teardrop Mosquitofish [Fishbase], Tropical Mosquitofish, Bandit Mosquitofish (Gambusia sexradiata) CA [fem. max. 5 cm]
Gambusia xanthosoma (Grand Cayman)
Girardinus cubensis (Cuba)
*Grand Cayman Limia (Limia caymanensis) (Grand Cayman)
Limia dominicensis (Haiti)
Limia rivasi (Haiti)
*Sulphur Limia (Limia sulphurophila) (Dom. Rep.)
Neoheterandria cana CA (Panama)
*Tiger Teddy (Neoheterandria elegans) SA
*Picotee Livebearer [Fishbase], Fairweather/Elegant Widow (Phallichthys fairweatheri) CA
*Four-Spot/Domino Widow (Phallichthys quadripunctatus) CA (Costa Rica)
*Pallid Widow (Phallichthys tico) CA (Costa Rica)
*Dusky Millions Fish [Fishbase], Caudo (Phalloceros caudimaculatus) SA
Phalloptychus januarius SA
Poecilia amazonica SA
(*)Branner's Livebearer, Ocellated Micromolly (Poecilia branneri) SA
*Cauca Molly, South American Molly (Poecilia caucana) CA-SA
*Dwarf Molly (Poecilia chica) CA (Mexico)
*Caracas Livebearer, Dwarf Limia, Haiti Limia, Venezuela-Molly (Poecilia heterandria) SA
Poecilia minima SA
Poecilia minor SA
Poecilia sulphuraria CA (Mexico)
Poeciliopsis baenschi
Poeciliopsis monacha CA (Mexico)
*Blackstripe Livebearer (Poeciliopsis prolifica) CA (Mexico)
Pseudopoecilia chocoensis SA
Pseudopoecilia festae SA
Pseudopoecilia nigroventralis SA
Pseudopoecilia panamensis CA (Panama)
*Barred Topminnow (Quintana atrizona) (Cuba)
Xiphophorus continens (Mexico)
*Monterrey Platyfish (Xiphophorus couchianus) (Mexico)
*Northern Platyfish (Xiphophorus gordoni) (Mexico)
*[Southern] Platy (Xiphophorus maculatus) CA
*Catemaco Platyfish (Xiphophorus milleri) (Mexico)
*Pygmy Swordtail (Xiphophorus pygmaeus) (Mexico)
*Swordtail Platyfish (Xiphophorus xiphidium) (Mexico)

Those marked with * are the most likely to be found.

[Sources: Kim M. Walther 2005: Registrations of Livebearers. Denmark.
English names from Fishbase and/or Master Index of Freshwater Fishes]
 

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Discussion Starter #25
(gasp!) :icon_eek:

Holy crap that's a lotta fish!!! Heh...

Perhaps we should narrow this down just a bit at this juncture; how many of these fish are actually available to hobbyists, Daniel*Swords?
 

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Ah, that's the real question! I compiled the list from a booklet that lists all livebearers and whether they are kept by some people. Those mentioned are kept, mostly by active livebearer hobbyists. I think most of them might be available only through the respective livebearer associations.

Yes, I might have just gone a bit overboard there, ;) I agree. Got a bit carried away while planning my pico and looking for suitable fish for it! :hihi:

I think I'll put a * before those that are most likely most easily available. That ok idea?
EDIT: Just did that..:)
 

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Discussion Starter #27
One other thing: are there common [English] names for any of these guys? Something I've noticed is that you Finns have common names for fish English-speakers have never even seen...

Also - are there any proposals for how we should break this list down when it becomes too long to simply be a quick-reference guide? I think it should be a functional distinction, i.e. by preferred water parameters so people considering community tanks can more easily find neighbors for their fish, but I'm also open to suggestion.
 

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I say make a list based on availability as that would be most helpful, then another list with "potential" nano fish.

Nice job guys
 

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alphacat said:
One other thing: are there common [English] names for any of these guys? Something I've noticed is that you Finns have common names for fish English-speakers have never even seen...
Well, as I'm not a native English speaker I have to rely on other sources, mainly the net. I was kind of hoping that you English speakers would supply the common names. I did edit in some names from Fishbase and MIFF...

I was kind of thinking that giving the continent would give the reader a guestimate for the preferred water values and also some idea for a geotope maybe. I suppose there are more clever ways of doing it. ;)

How about making a quick list in the beginning of the thread with most common ones and giving just links to further down the thread for others? Say, like a link titled: more livebearers. That would work if the fish would be grouped by families. Otherwise? Maybe not. I can edit my lists in any shape you guys think would be most useful!! :)
 

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Discussion Starter #30
Thanks Daniel. I've been thinking about this a little, and I agree with your idea - with one little revision: the first list of common fish should also have some kind of basic list for first-timers of fish that are easy to keep, along with either a footnote or a separate post in this thread detailing anything that beginners should know.

For instance, Endlers & Guppies reproduce like mad, Otos, Corys, and Plecos like to be kept in groups of at least X amount, these other fish are schoolers with a minimum of __...

Does that make sense to everybody?
 

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that sounds like it would me most practical.
 

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Coming back to this fascinating project...;) In the article I have been using for some help (Markku Varjo 2005: Kalojen kääpiösarjalaiset)... there're still these left:

Flame Tetra (Hyphessobrycon flammeus)
Black Neon Tetra (Hyphessobrycon herbertaxelrodi)
Black Phantom Tetra (Hyphessobrycon megalopterus)
Red-Tailed Phantom Tetra (Hyphessobrycon roseus)
(Hyphessobrycon eques)

Marbled Hatchetfish (Carnegiella strigata strigata)
Carnegiella strigata fasciata
Black-winged Hatchetfish (Carnegiella marthae)
Pygmy Hatchetfish (Carnegiella myersi)

False Cory (Aspidoras pauciradiatus)

Hara jerdoni
Shadow Catfish (Hyalobagrus flavus, ex. Pelteobagrus ornatus)

:D
 

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Here's some more:
Croaking Pygmy Gourami Trichopsis vittatus
Dadio (Orange Chela) Chela dadyburjori
Asian Rummynose Sawbwa resplendens
Schooling Bumblebee Goby Brachygobius aggregatus
Red Licorice Gourami Parosphromenus sumatranus (Parosphromenus deissneri)
Green-eye Rasbora Rasbora dorsiocellata
Dwarf Gold Barb Barbus gelius

All found at this wonderful site http://www.franksaquarium.com/nanofish.htm that is unfortunately closed until June 27th, '06.
 

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To the OP, I'm sure many users here would appreciate the categorization not just of species type, but also by the size of the tank.
 

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Discussion Starter #35
That'd definitely be useful too, I agree: however, revising this list took a turn for the complicated due to all the different suggested ways of sorting this list. Daniel*Swords has generously volunteered his time for this as well - but any other volunteers would be great too.

At this point I'm thinking perhaps some kind of a spreadsheet is in order for this - that way we can show multiple parameters that are useful, such as size, water temp & pH requirements, stocking & neighbor-friendliness info, etc. - instead of having one list showing all fish in a certain size range, then another separate list entirely showing what you can/can't put in the tank with them, you know?
 

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Daniel*Swords said:
P.S. Btw. the species name is not capitalised - only family name is. ;)
Actually, not to rant but just to clarify, the 'species name' refers to both the genus and the specific epithet, most commonly incorrectly refered to as the 'species name'. A species name is comprised of two parts -the genus (the first part) and the specific epithet (the second part). I do not mean to rant but people throw around scientific verbage constantly and i just wanted to let people know of this distinction - even people who are well trained in the biological sciences misuse these terms.

:)
 

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agdavis said:
the 'species name' refers to both the genus and the specific epithet, most commonly incorrectly refered to as the 'species name'.
Thanks agdavis for clearing that up! All very logical now that you mention it! After this, it'll be that much more easier for me to try to pass as a biologist. :hihi:

Some more fishes (found in the thread):
Gertrude's Rainbow/ Gertrude Blue-eyes (Pseudomugil gertrudae)
Dwarf Red Bettas (Betta coccina, tussyae, rutilans, persephone, etc.)

Then in the link posted by Sarahpea above we can find:
Burmese Pink Neon Rasbora (Microrasbora rubescens)
 

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I would like to add:

Threadfin Rainbows, Just about an Inch and look Fabulous when Mature.
Gold WCMM
Honey/Sunset Gouramis
 

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Guys! I think we are missing all the nice killis!! :icon_eek:
Anyone keep those to give us a starting point? :)
havent kept them, but they look awsome and stay small(1.5"). From what Ive read, they dont require the ammount of work most killis require for breeding I.E. removing the eggs for a set ammount of time.
Simpsonichthys magnificus AKA Magnificus Killi
 
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