Juvenile Sucker, or Minnow ? ID help

Hi All,

Thanks for reading. Is this a juvenile sucker, or suckmouth minnow?  This is a 1.5-2 inch baby from Alberta, random dark brown pattern on the back, very white belly, mouth pointing almost straight down, always sucking the bottom. Eyes can roll downward. Not a very strong swimmer, not very wary of danger. 

Thanks!

photographing is hard , tried to restrict them in a small container ...sorry I cant get a clear image

It is hard. I believe you have a juvenile white sucker.

Juvenile white sucker.

thanks!

Don't know what's in Alberta, but looks like a very young White Sucker.  Definitely not Suckermouth Minnow.