Quote Originally Posted by deylin View Post
I haven't seen him spawn from just getting a bite. It seems to spawn as soon as the glimmerscale goes into your inventory.
http://youtu.be/1H6OZSYjqGI
This is correct, many time's have i lost zona seeker and theda, through 'fish got away' but i've always noticed it's a chance to spawn upon catch!

My friend caught his first judgeray the other day, and spawned theda, even though i have 20+ judgeray from trying to spawn