Vycotan Sex System
Vycotans only produce one kind of gamete, similar to a human egg sell it is large but there is cilia present on the surface of some produced which allows them to move towards an intended target, a second foreign gamete. There are protiens on the outside of these gamete sells which present feralization by cells from the same body. While it does occasionally happen in certain circumstances it is rare.
There has been an interesting line of evolution present that is seen in different vyctoans. The ancestor of the modern day vyctoan was a unisex species meaning that they had both inseminating and gestating organs. However over the last several millions of years there has been a mutation that has occurred where some individuals only have one set of reproductive organs (either insemination or gestion) or they will have both but only one is capable of operating while the other is underdeveloped. This has led to an interesting split.