Lemon_Stone
Rancher
One of the fish that Demetrius can ask that the player cull due to their population getting out of hand is the tiger trout. To me, this doesn't make much sense, seeing as the tiger trout is described as "a rare hybrid trout that cannot bear offspring of its own," and this is even reflected by how tiger trout behave in a fish pond. While they do still produce roe, they're the only fish whose pond population cannot increase on its own, so the player has to manually stock the pond if they want to get a fully-stocked tiger trout pond.