Yup, it is a male releasing sperm. The females release small egg capsules, one right after another. And it is
a go idea to change water.
Technically speaking;
The spermatogonia ( immature germinal male cells) arise in the mesenterial endoderm, from the gonads, and migrate singly or in groups into the mesogela, where they are enclosed in cysts or vesicles. As the cysts or vesicles enlarge, the maturation of sperm then proceed from the centre to the periphery. The cysts are often surrounded by a layer of endodermal cells, which acts it is believed as a nutrient. When ripe, the cysts are filled with sperm and at spawning the cysts and surrounding endoderm rupture, releasing sperm into the coelenteron.
This should help. It is labeled here as septa, which is incorrect, they are called mesentery. In short, the are incomplete walls/ partitions.
Ok, so what the h^ell is mesogela ? It is an elastic composite material of fibers in a liquid matrix of protein polymers, which help support the anemone. The endoderm is the innermost body layer. Most animal have 3 layers but corals and anemones only have 2 layers. The mesogla is what is used as the "fill" between these layers.
