u/goldenspartanx

I've watched both shows a few times but I could never figure out why the pod of mermaids from the Mako Mermaids series had never made themselves known in the og show. Obviously the real reason is that the Mako Mermaids show came out after, but did the show ever give a canon explanation for their absence in the previous years?
My theory would just be that they're a migrating/nomadic species so they could've just left for a few years and then came back, but obviously Mako island and the moon pool are pretty important to them, so idk.