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ABA | ABE | ABI | ACC | ACM | ACS | ADL | ADO | AFI | AGI | AGT | AGZ | AHL | AII | AKR | ALI | ALM | ALS | ALT | ALX | AMB | AMI | AMO | AMP | AMT | ANC | AND | ANG | ANI | ANL | ANN | ANS | ANT | APA | APH | API | APL | APO | APR | APU | ARA | ARF | ARN | ARO | ARS | ASH | ASQ | ATB | ATH | ATL | ATM | ATO | ATQ | ATR | AUC | AUR | AUS | AVI | AVZ | AXI | AZU

A killifish
The "A" killifish
Species List

Aphyosemion abacinum

Aphyosemion abacinum


Procatopus aberrans

Procatopus aberrans


Fundulus albolineatus (ex)

Fundulus albolineatus (ex)

Extinct. Not recorded in over a century. Its only known habitat has seen its banks lined with cement, been pumped dry on multiple occasions and what little segregated pools were reserved were stocked with non-native carp and goldfish.


ACC

Austrolebias accorsii


Aphyosemion (Chromaphyosemion) aurantiacum

Aphyosemion aurantiacum


Neofundulus aureomaculatus

Neofundulus aureomaculatus


Austrolebias adloffi

Austrolebias adloffi


Simpsonichthys adornatus

Simpsonichthys adornatus


AFI

Austrolebias affinis



Leptopanchax aureoguttatus

Leptopanchax aureoguttatus


Orestias agassizii

Orestias agassizii



Aplocheilichthys antinorii

Aplocheilichthys antinorii


Cynolebias akroa

Cynolebias akroa


Nothobranchius albimarginatus 'Yellow'

Nothobranchius albimarginatus


Aphanius almiriensis

Aphanius almiriensis


Nothobranchius Albertinensis

Nothobranchius albertinensis


Hypsolebias alternatus

Hypsolebias alternatus


Austrolebias alexandri

Austrolebias alexandri


Rivulus (Malenorivulus) amanbaeensis

Rivulus amanbaeensis


Fundulopanchax amieti

Fundulopanchax amieti


Aphyosemion amoenum

Aphyosemion amoenum


Rivulus amphoreus

Rivulus amphoreus


Aplocheilus armatus

The true A. panchax only occurs in Bengal and the Ganges drainage. There is one form in the Adamans Islands, (A. adamanticus). All other forms from India to Borneo are A. armatus.


Nothobranchius (Adin.gue) annectens

Nothobranchius annectens


AND

Aplocheilus andamanicus

Aplocheilus andamanicus differs from topotypic A. panchax by the combination of the following characters: the most discussed (Day, 1878; Köhler 1906; Herre, 1939) being body size difference, A. andamanicus grows much larger in size (it is probably the largest Aplocheilus in South and South-East Asia), to at least 74.8 mm SL (vs. smaller in size); 9–10 dorsal-fin rays (vs. 6–8); 15 principal and 18–19 procurrent caudal-fin rays (vs. 12–13 principal and 12 procurrent caudal-fin rays); dorsal fin with posterior margin widely separated from caudal-fin base or hypural plate (vs. extending beyond vertical through caudal base or hypural plate); pectoral fin extending beyond vertical through anterior one-third of pelvic fin (vs. pectoral fin extending to half the length of pelvic fin); pelvic fin nearly reaching vent when adpressed but well separated from anterior base of anal fin (vs. pelvic fin extends beyond vent reaching anterior base of anal fin); caudal-fin margin rounded (vs. more oval in) (Fig. 3); lateral line system incomplete extending up to the vertical from posterior margin of dorsal fin base (vs. lateral line system complete, reaching caudal-fin base); total vertebrae 33–34 (vs. 28–30); pre-anal vertebrae 13–14 (vs. 11–12); caudal vertebrae 18–19 (vs. 14–16); median scale “A” of frontal squamation pattern smaller than scale “B” (vs. median scale “A” significantly larger than scale “B”) (Fig. 3); single anterior rostral and posterior rostral neuromasts (vs. 2 anterior rostral and 3 posterior rostral neuromasts). Day (1878) reported a total of up to 11 dorsal-fin rays in his Andaman collection, a character that was subsequently used by Köhler (1906) to diagnose A. andamanicus. Radiographs of Day’s collection (syntypes, BMNH 1889.2.1.2107-2110) and cleared and stained topotypes (BNHS FWF 384 & 385) of A. andamanicus showed, however, only 9–10 dorsal-fin rays. In any case, the dorsal-fin ray count is still valid and is the most significant diagnostic character that distinguishes A. andamanicus from A. panchax (9–10 vs. 7–8).Furthermore, A. andamanicus can easily be distinguished from A. panchax based on its unique coloration pattern including, dorsal fin extremity deep yellow or saffron (vs. blue in A. panchax); distal half of anal fin hyaline in female or studded with three longitudinal rows of vertically elongated red dots (vs. distal half of anal fin deep iridescent blue); pelvic fin yellow (vs. hyaline in A. panchax); and caudal fin periphery hyaline or subtle red (vs. deep iridescent blue in A. panchax). Both species are also genetically distinct, with a cox1 distance of 9.6–10.8% (Table 2)


Nothobranchius angelae

Nothobranchius angelae


Rivulus (Laimosemion) anitae

Rivulus anitae


Pachypanchax arnoulti

Pachypanchax arnoulti


Epiplatys annulatus

Epiplatys annulatus

The color of dorsal fin changes from country to country - it's red in the in Sierra Leone, blue in Liberia and yellow in Guinea.


Epiplatys ansorgii 'Massana GJS 00-02'

Epiplatys ansorgii


Hypsolebias antenori

Hypsolebias antenori


APA

Austrolebias apaii


Aphyosemion alpha

Aphyosemion alpha


Rivulus (Melanorivulus) apiamici

Rivulus apiamici


Trigonectes aplocheiloides

Trigonectes aplocheiloides


Tellia apoda

Tellia apoda


APR

Megupsilon aporus

Became extinct in the wild in the late 1980s and hangs by a thread in the hobby - it must eat every couple of hours and likes it unusually warm for a killifish.

As of 2020 they are allegedly extinct and no more remain in the hobby; they became extinct in nature in the mid 1980s.


Moema apurinan

Moema apurinan


Austrolebias arachan

Austrolebias arachan


Prorivulus auriferus

Prorivulus auriferus


Fundulopanchax arnoldi

Fundulopanchax arnoldi


ARO

Fundulus auroguttatus


Hypsolebias auratus

Hypsolebias auratus


Papiliolebias ashleyae

Papiliolebias ashleyae


Kosswigichthys asquamatus

Kosswigichthys asquamatus


Nothobranchius attenboroughi

Nothobranchius attenboroughi


Rivulus (Melanorivulus) aithogrammus

Rivulus aithogrammus


Anatolichthys anatoliae anatoliae

Anatolichthys anatoliae anatoliae


ATM

Plesiolebias altamira


Cyprinodon atrorus

Cyprinodon atrorus


ATQ

Epiplatys atratus

The only known photo.


Rivulus atratus

Rivulus atratus


Austrolebias araucarianus

Austrolebias araucarianus


AUR

Aphyosemion aureum


Aphyosemion  australe, wild ("Chocolate") form.

Aphyosemion australe


Aphyosemion avichan

Aphyosemion avichang


Cyprinodon alvarezi

Cyprinodon alvarezi


Paraphanius alexandri

Paraphanius alexandri


Epiplatys olbrechtsi azureus

Epiplatys olbrechtsi azureus



Sorted by Code
ABA   Aphyosemion (Diapteron) abacinum
ABV   Crenichthys baileyi albivallis
ACM   Aphyosemion (Chromaphyosemion) aurantiacum
ACT   Neofundulus acutirostratus
ACU   Epiplatys (=SPI) acuticaudatus
ADI   Fundulus adinia
ADO   Simpsonichthys (Hypsolebias) adornatus
AFS   Cyprinodon artifrons
AGI   Rivulus (Laimosemion) agilae
AGU   Fundulus auroguttatus
AHL   Aphyosemion (Mesoaphyosemion) ahli
AIF   Cyprinodon variegatus artifrons
AKA   Aphyosemion (=SCE) scheeli akampaense
ALB   Cynolebias albipunctatus
ALE   Rivulus (Melanorivulus) albae
ALL   Fundulus antillarum
ALM   Aphanius (Aphanius) almiriensis
ALT   Simpsonichthys (Hypsolebias) alternatus
AMA   Rivulus (Laimosemion) amanapira
AMB   Rivulus (Melanorivulus) amanbaeensis
AMG   Cyprinodon nevadensis amargosae
AMI   Fundulopanchax (Paraphyosemion) amieti
AMK   Nothobranchius amsingki
AMN   Rivulus (Anablepsoides) amanan
AMO   Aphyosemion (Mesoaphyosemion) amoenum
AMP   Rivulus (Anablepsoides) amphoreus
AMS   Aphyosemion (=FIL) amsingki
ANI   Rivulus (Laimosemion) anitae
ANS   Epiplatys (Epiplatys) ansorgii
ANT   Simpsonichthys (Hypsolebias) antenori
APH   Aphyosemion (Chromaphyosemion) alpha
API   Rivulus (Melanorivulus) apiamici
ARC   Cyprinodon arcuatus
ARK   Aphanius arakensis
ARN   Fundulopanchax (Paludopanchax) arnoldi
ARS   Simpsonichthys (Hypsolebias) auratus
ART   Fundulus aureus
ARU   Plesiolebias aruana
ATA   Lacustricola atripinna
ATH   Rivulus (Melanorivulus) aithogrammus
ATI   Aplocheilichthys atripinnis
ATL   Aphanius (Anatolichthys) anatoliae
ATQ   Epiplatys (Epiplatys) atratus
ATR   Rivulus (Anablepsoides) atratus
ATS   Cynolebias altus
ATT   Cynolebias attenuatus
ATU   Cyprinodon (=PIS) artatus
ATV   Rivulus (Laimosemion) altivelis
AUA   Rivulus (Anablepsoides) auratus
AUR   Aphyosemion (Mesoaphyosemion) aureum
AUS   Aphyosemion (Mesoaphyosemion) australe
AVI   Fundulopanchax (Paludopanchax) avichang
AVL   Cyprinodon albivelis
AXI   Aphanius (Paraphanius) alexandri
AZS   Rivulus (Vomerivulus) azurescens
AZU   Epiplatys (Parepiplatys) olbrechtsi azureus
Sorted by Genus
ARK   Aphanius arakensis
AXI   Aphanius (Paraphanius) alexandri
ATL   Aphanius (Anatolichthys) anatoliae
ALM   Aphanius (Aphanius) almiriensis

AMS   Aphyosemion (=FIL) amsingki
AKA   Aphyosemion (=SCE) scheeli akampaense
ABA   Aphyosemion (Diapteron) abacinum
APH   Aphyosemion (Chromaphyosemion) alpha
AMO   Aphyosemion (Mesoaphyosemion) amoenum
AHL   Aphyosemion (Mesoaphyosemion) ahli
AUS   Aphyosemion (Mesoaphyosemion) australe
AUR   Aphyosemion (Mesoaphyosemion) aureum
ACM   Aphyosemion (Chromaphyosemion) aurantiacum

ATI   Aplocheilichthys atripinnis



ABV   Crenichthys baileyi albivallis

ALB   Cynolebias albipunctatus
ATT   Cynolebias attenuatus
ATS   Cynolebias altus

AMG   Cyprinodon nevadensis amargosae
ARC   Cyprinodon arcuatus
ATU   Cyprinodon (=PIS) artatus
AVL   Cyprinodon albivelis
AFS   Cyprinodon artifrons
AIF   Cyprinodon variegatus artifrons

ANS   Epiplatys (Epiplatys) ansorgii
AZU   Epiplatys (Parepiplatys) olbrechtsi azureus
ATQ   Epiplatys (Epiplatys) atratus
ACU   Epiplatys (=SPI) acuticaudatus

ARN   Fundulopanchax (Paludopanchax) arnoldi
AMI   Fundulopanchax (Paraphyosemion) amieti
AVI   Fundulopanchax (Paludopanchax) avichang

ALL   Fundulus antillarum
AGU   Fundulus auroguttatus
ADI   Fundulus adinia
ART   Fundulus aureus


ATA   Lacustricola atripinna





ACT   Neofundulus acutirostratus

AMK   Nothobranchius amsingki




ARU   Plesiolebias aruana




ATH   Rivulus (Melanorivulus) aithogrammus
AMA   Rivulus (Laimosemion) amanapira
AMB   Rivulus (Melanorivulus) amanbaeensis
ANI   Rivulus (Laimosemion) anitae
AMN   Rivulus (Anablepsoides) amanan
AMP   Rivulus (Anablepsoides) amphoreus
AZS   Rivulus (Vomerivulus) azurescens
AUA   Rivulus (Anablepsoides) auratus

ATV   Rivulus (Laimosemion) altivelis
AGI   Rivulus (Laimosemion) agilae

API   Rivulus (Melanorivulus) apiamici
ALE   Rivulus (Melanorivulus) albae
ATR   Rivulus (Anablepsoides) atratus

ADO   Simpsonichthys (Hypsolebias) adornatus
ARS   Simpsonichthys (Hypsolebias) auratus
ALT   Simpsonichthys (Hypsolebias) alternatus
ANT   Simpsonichthys (Hypsolebias) antenori


Sorted by Species
ABA   abacinum, (Diapteron) Aphyosemion
ACU   acuticaudatus, (=SPI) Epiplatys
ACT   acutirostratus, Neofundulus
ADI   adinia, Fundulus
ADO   adornatus, (Hypsolebias) Simpsonichthys
AGI   agilae, (Laimosemion) Rivulus
AHL   ahli, (Mesoaphyosemion) Aphyosemion
ATH   aithogrammus, (Melanorivulus) Rivulus
ALE   albae, (Melanorivulus) Rivulus
ALB   albipunctatus, Cynolebias
AVL   albivelis, Cyprinodon
AXI   alexandri, (Paraphanius) Aphanius
ALM   almiriensis, (Aphanius) Aphanius
APH   alpha, (Chromaphyosemion) Aphyosemion
ALT   alternatus, (Hypsolebias) Simpsonichthys
ATV   altivelis, (Laimosemion) Rivulus
ATS   altus, Cynolebias
AMN   amanan, (Anablepsoides) Rivulus
AMA   amanapira, (Laimosemion) Rivulus
AMB   amanbaeensis, (Melanorivulus) Rivulus
AMI   amieti, (Paraphyosemion) Fundulopanchax
AMO   amoenum, (Mesoaphyosemion) Aphyosemion
AMP   amphoreus, (Anablepsoides) Rivulus
AMK   amsingki, Nothobranchius
AMS   amsingki, (=FIL) Aphyosemion
ATL   anatoliae, (Anatolichthys) Aphanius
ANI   anitae, (Laimosemion) Rivulus
ANC   annectens, (Adiniops) Nothobranchius
ANS   ansorgii, (Epiplatys) Epiplatys
ANT   antenori, (Hypsolebias) Simpsonichthys
ALL   antillarum, Fundulus
API   apiamici, (Melanorivulus) Rivulus
ARK   arakensis, Aphanius
ARC   arcuatus, Cyprinodon
ARN   arnoldi, (Paludopanchax) Fundulopanchax
ATU   artatus, (=PIS) Cyprinodon
AFS   artifrons, Cyprinodon
ARU   aruana, Plesiolebias
ATR   atratus, (Anablepsoides) Rivulus
ATQ   atratus, (Epiplatys) Epiplatys
ATA   atripinna, Lacustricola
ATI   atripinnis, Aplocheilichthys
ATT   attenuatus, Cynolebias
ACM   aurantiacum, (Chromaphyosemion) Aphyosemion
AUA   auratus, (Anablepsoides) Rivulus
ARS   auratus, (Hypsolebias) Simpsonichthys
AUR   aureum, (Mesoaphyosemion) Aphyosemion
ART   aureus, Fundulus
AGU   auroguttatus, Fundulus
AUS   australe, (Mesoaphyosemion) Aphyosemion
AVI   avichang, (Paludopanchax) Fundulopanchax
AZS   azurescens, (Vomerivulus) Rivulus
ABV   baileyi albivallis, Crenichthys
AMG   nevadensis amargosae, Cyprinodon
AZU   olbrechtsi azureus, (Parepiplatys) Epiplatys
AKA   scheeli akampaense, (=SCE) Aphyosemion
AIF   variegatus artifrons, Cyprinodon