|Spotted salamander eggs|
Many, but not all, of the Yellow-spotted Salamander egg masses have a green hue like the one pictured above.
That green hue is also visible in all these wood frog egg masses.
With a closer examination of those wood frog eggs,
you can see the green hue is coming from within an inner layer of the egg jelly.
Now since I have a microscope handy, I can share with you a glimpse inside that jelly sac.
The green color in the eggs is coming from a sea of these microscopic algal cells.
These algae have a symbiotic relationship with the embryos. In these mutually beneficial relationships, the algal symbiont provides oxygen in return for carbon dioxide and other wastes from the embryos. The helpless little embryos are provided with their own extra oxygen generators and carbon dioxide scrubbers (somewhat of a natural scuba rebreather system) to aid in the respiratory processes.
|Wood frog eggs with symbiotic algae.|
See a post about the spotted salamander eggs and their symbiotic algae
More to explore: