
There's a surprising amount of fish to catch in Hello Kitty Island Adventure, but the Opal Flutterfin is by far one of the more challenging to locate. There are two places across Friendship Island where these fish predominantly spawn, so if you're looking for them for a quest, or your own personal collection, then you'll want to head here first.
Before you head out fishing, you'll have to complete Badtz-Maru's "Keep it Reel" quest. This will automatically be unlocked once you've hit Level 3 friendship with him, which means presenting him with a lot of daily gifts to boost your level as quickly as possible. But if you're already looking for specific fish species to find, you've probably already done this. So let's jump in and find out where to get Opal Flutterfin.