Is this the start of fox tailing on my Gorilla Glue #4 ?

[East Coast Marley420]

New to indoor not sure if this is the start of fox tailing on my Gorilla Glue #4
Day 51 of flower,
Mars hydro tsw2000, recommend height in flower is 12 to 18 inches, I am between 13 and 15 inches.

 

[Pennywise]

Could be foxtailing but looks normal for GG4.

 

[East Coast Marley420]

Could be foxtailing but looks normal for GG4.

Awesome thanks pw, also first time growing GG