I was fishing for a Clawitzer and then low and behold, after several missed attempts... a shiny Relicanth appeared! Caught it and then after a few more fishes (not very many at all) a Clawitzer appeared... and it was shiny :)
Couldn't believe my luck haha, I researched Chain Fishing after that and realised it was an actual thing as opposed to me just having insane luck lol xD I didn't know it was real when I got my shinies so I wasn't counting, but it wasn't a frustratingly long time at all :)
Yeah that happens as long as the chain doesnt break ive been having horrible luck right now though no shinies and briken chains