What is this green sack being expelled by Cucumaria miniata?

Hi group!

I witnessed a widespread orange sea cucumbers - gumboot chitons gametes broadcasting episode a month ago (mid-Vancouver Island, Canada). I need help with this orange sea cucumber (Cucumaria miniata): what is the green sack that it's expelling?

It seems to contain eggs-like small spheres, but it doesn't look like the usual green egg sack that Cucumaria miniata releases, many of which were floating around (photo). Plus, this particular individual seems to be ejecting sperm (?) and AFAIK Cucumaria miniata is not hermaphrodite.