Welcome to Bloodlines: Hoshigaki Progression 

I'm not sure. I was swimming when I got it

Try using water moves, sometimes that works when you get the prompt but the shark won't light up

I've had all water skills and the shark wasn't unlocked yet, you have to spam them. I've also gotten the shark to awaken without all of the skills. So you need to spam them, and you don't need to unlock all of them.

@@OlvaarGaming then how did I unlock it without spamming them and just unlocking them all????

@@WhyNotWaitHere You probably didn't notice it. I still have the footage of spamming the moves for a while (I had all of them) and the shark wasn't active.

they drop from corrupted crystals

or do mango chicken soup quest