HELP TO ID THESE CORYDORAS

[pleco-island]

Could someone please help ID these corydoras, i have had them around 4 months now and i would just like to know what they are for once..
they cost a bomb but would like to know as they are starting the up/down motion..

cheers
chris

 

[weisel]

up and down motion?, cant remeber the scientific name. sorry. hahaha

peace

 

[FF MkII]

up and down motion?, cant remeber the scientific name. sorry. hahaha

peace

Getting ready to spawn. Cleaning potential spawning site.

 

[FF MkII]

Anyway, The fish look like Ambiacus

 

[Stensson]

How to tell them apart from agassizii ?