From 2speccers2tools wiki

The Travatze is a very, very strange organism, evolving near-immediately in response to the transbruh, it has a single quirk to its life that is very important: all Travatze are born male, no matter what. This may sound disadvantageous, but all Travatze are also given a ‘seeding’ of transbruh by their parents through the fleshy receptacle organ that has developed from their genitals, this is also where they store Transbruh, thus, whenever a Travatze needs, it can release some of the contents of this organ into its main body, allowing it a quick gender-switch when needed. This has allowed transbruh to be prolific predators in the Oofle Jungle.