These penetrate the jelly envelope after the eggs are laid and may increase the supply of oxygen to the embryo through photosynthesis.
ðiːz pˈɛnɪtɹˌeɪt ðə dʒˈɛli ˈɑːnvəlˌoʊp ˈæftɚ ðɪ ˈɛɡz ɑːɹ lˈeɪd ænd mˈeɪ ɪŋkɹˈiːs ðə səplˈaɪ ʌv ˈɑːksɪdʒən tə ðɪ ˈɛmbɹɪˌoʊ θɹuː fˌoʊɾoʊsˈɪnθəsˌɪs.