Endler guppies tail

[RoscoPeeko]

Hi all, i've had the endlers in the tank for around a month and a half... They have all grown, but i noticed that 2of their tails have changed... I done an image search to see if this was normal but i can't find any pictures of guppies like theses... Basically, the clear bit of the tail you can see through has continued growing out like a point. I've uploaded a drawing to illustrate.

Is this normal? Why hasnt the others developed like this?

 

[jetajockey]

could be a few things. Some actual pictures would be really nice, but I'm guessing you can't get any right now. It could be a strain variant, or it could be that the endlers are mixed with guppies at some point down the line.
Page 3) Hybrid Endlers Livebearer

 

[RoscoPeeko]

Hi,

Just got photo now...

 

[RoscoPeeko]

The fishes tail must have been growing? It is now perfectly normal...