Help To Identify Type Of Plecos Please?

[Sarahlr3]

Hi ive recently acquired a 120l aquarium that came complete with fish and 3 plecos. One is most definitely a bristlenose but im concerned that the other 2 are going to be large varieties. The small one is only about an inch at present and the medium is about 2.5.  Couldn't really get a great picture of the middle sized one sorry but hes very similar to the small one just a bit darker. All 3 including the bristlenose have similar shapes and colouring. Many thanks

 

[betta fish]

Hi, from what I can see they are both bristlenoses in the pics.

 

[NickAu]

 I would say the one on the right is a male BN Pleco