/tg/ Station 13 - Modules - Types

code/modules/fishing/fish/fish_traits.dm

/datum/fish_trait/no_matingUseful for those species with the parthenogenesis trait if you don't want them to mate with each other, or for similar shenanigans, I don't know. Otherwise you could just set the stable_population to 1.
/datum/fish_trait/recessivePrevent offsprings of fish with this trait from being of the same type (unless self-mating or the partner also has the trait)
/datum/fish_trait/anxietyAnxiety means the fish will die if in a location with more than 3 fish (including itself) This is just barely enough to crossbreed out of anxiety, but it severely limits the potential of