Rhoadsia altipinna tetra behavior change

[mountaintoppufferkeeper]

Dominant male defending the back right corner from intruders. Fairly certain we have a spawn back there based off his color change and his behavior change to that mouth open teeth showing display. Dominant male in back non dominant male in front. It's a pretty intimidating show with him flying around leading with his teeth. 

Females have darkened up. Female is on the far left. Caves and wood are primarily to break sight lines and allow for some cover for a few sterbai corydoras 

[SimmonsSnailsNScales]

I was not aware tetras had any parental instinct. This is very interesting.

[mountaintoppufferkeeper]

@SimmonsSnailsNScalesThese are the first I have heard of doing this behavior; thats what sold me on them. It is more of a guarding of territory and fry in that territory indirectly but the reports are they do not eat the fry either