Once they reach sexual maturity the breeding tube may continue to be present, even if they're not about to spawn. When they're ready to spawn you will see a noticeable change in the size and color (light pink if I remember correctly) I'm guessing its the same for other Pty species?
Sent from my Nexus 9 using MonsterAquariaNetwork App
Sent from my Nexus 9 using MonsterAquariaNetwork App
