What about legendary fish now?

Okay so just got a question hoping someone can answer. Now that the game is basically discontinued, how does the legendary rotation work? Is there even a rotation? Are legendaries all just there? If so where the heck can I find them? My concern is that I haven’t gotten the big big rods in the souvenir shop yet and I want those to catch the big big fish. Problem is I need to catch legendaries to get that stuff and I haven’t been able to find any info on legendaries