Re: Undulate trigger The undulated trigger is a hardy fish and a very very mean one as well. I would just be prepared to get a bigger tank once he starts to grow and plenty of rock as that trigger will like to hide and ambush other fish, but then if he is the only fish in the tank you may not see him much. I have one with a clown trigger and dog-faced puffer. Even though the clown is 2 inches bigger, he steers clear of the undulated trigger whenever possible. |