Platy black spot

[Luxy]

I have had my platies 2 months now and to day noticed some black marks on her tail and fins but not noticeable anywhere else is it black spot , new marking or something else I should worry about

 

[carligraceee]

I have had my platies 2 months now and to day noticed some black marks on her tail and fins but not noticeable anywhere else is it black spot , new marking or something else I should worry about

Looks like new markings to me. There are people on her more educated in fish diseases than me but it looks like she is pretty young. She could be developing more markings. She is very pretty!