What causes the slight green hue sometimes observed in the gelatinous egg masses?

Answer

Symbiotic algae living within the jelly layer

The clear, gelatinous egg masses can exhibit a slight green coloration due to the presence of symbiotic algae that reside within the jelly layer surrounding the eggs.

What causes the slight green hue sometimes observed in the gelatinous egg masses?
animalclassificationSalamander