Did Rahi reproduce at all?

[Surel-nuva]

The answer was literally 2 topics below.

(How) Do new Rahi come into existence?

Rahi were produced by the Makuta. I believe the “no biological reproduction” rule applies to them as well, though I will stand corrected if we said differently in story somewhere. The Matoran were catching fish when they were on the surface of Mata Nui, so they were fishing in Aqua Magna. Those weren’t Rahi fish for the most part, they were just fish. Rahi existed primarily inside the robot, not outside. It’s fan fiction, not canon, so you can do whatever you want in your own work.