Help My Daphnia Are Transparent And Not Red!

[shahrezsyed]

hello!
i have a daphnia culture started and feed them yeast. they are not dying but unlike all the daphnia cultures i,ve seen before, they are fully transparent except red. is this normal or abnormal??
shahrez

 

[loachman]

Could be just a different species of daphnia, or some similar copepod.

 

[saz326]

the red oned you saw may have just been feeding on red foods.

 

[OldMan47]

If you are feeding them pure yeast, try adding in some spirulina flake food ground up to a powder and some soybean flour. I tried to keep mine with about equal amounts of all 3 foods and had good looking daphnia. I ended up killing them trying to add green water into the mix and not making sure the fertilizers had all been used up growing the green water first.

 

[iSnail]

I also read that it's due to the oxygen level in the water. They appear more red in less oxygenated water because they tend to develop more hemoglobin to increase their oxygen uptake from the water.