Guppy endler hybrid super long??

[Princess_Glitzy]

Hi my batch of fry are typically ok especially my endler guppy hybrids I have female guppies male guppy’s and male endler however one just grew and it seems healthy but like what the hell you know she is so so long also sorry for the blurry water I was changing the water and had to turn the filter back on and gunk always gets everywhere also while I am here I have generations of guppies with round tails only and one day a split tail was born none of its parents grandparents children or siblings have it so I thought it’s a bit odd any input would help a ton thanks