Madagascar White Margin Anemonefish

[Yuri Barros]

I do not agree.......

I studied a lot Mascarene Plateau the birth place of (Amphiprion chrysogaster)......and (Amphiprion fuscocaudatus)........


Seychellesis granitic base island.....and Mauritius and Reunion is formed due the Reunion Hot Spot........


Allard´s belongs to the Latifasciatus Group........check again the esvolution os the tailpattern.............check the small yellow patch under Allard´s tail......

this yellow triangle at the base of caudal peduncle..........grows larger at Southwest Madagascar............turned into a yellow border....but the center of the tail remains White..........

only in the northwest and Comores Islands the tail becomes solid yellow.......

then in the Northeast Madagascar you will find the White Margins...specially in Masoala National Park region...........




and (A.bicinctus) belongs to (A. omanensis)......(A, nigripes)....and (A. chagosensis) group.........

 

[Yuri Barros]

check this vídeo.....you can see the type of Southwest Madagascar.......togetjer with the yellow tail........founded mostly in Northwest Madagascar........and Comores..........

https://www.youtube.com/watch?v=-Omf_cm3Z5Y

the fish founded in southwest....evolved to the yellow tail........

and the yellow tail......evolved to the White Margins......

this happens due sea currents......

 

[ThRoewer]

check this vídeo.....you can see the type of Southwest Madagascar.......togetjer with the yellow tail........founded mostly in Northwest Madagascar........and Comores..........

https://www.youtube.com/watch?v=-Omf_cm3Z5Y

the fish founded in southwest....evolved to the yellow tail........

and the yellow tail......evolved to the White Margins......

this happens due sea currents......

You're assuming that today's existing species are ancestors of another species still existing today. But that is rather unlikely. The ancestors of the fish we see today have gone extinct/evolved into the species we see today. And you can't draw ancestry conclusions based on color alone. We would need much more detailed genetic research to know the finer details of anemonefish species relationships.
By color I would say omanensis might be a hybrid between bicinctus and nigripes, but the genetics speaks against that.

As for ocean currents - what you see today may be quite different from the currents at the time the ancestors of all these fish arrived where their descendants live now. The ice ages of the past did not just expose a lot of landmasses you don't see today but also caused different winds that further altered current flows.

 

[Yuri Barros]

not only the color.........but juveniles aspect too......

if they show or not melanism according anemone species........

and Biogeography and Geology............

the thing start with Allard´s and end with White Margins.......this is a line.......

and this respond to the Sea Currents pattern...........

this is just for Allard´s and Madagascar fishes.......