Yup. There's an annoying bug that I can't figure out that freezes the game when the level loads. There's also another that messes up the echoes volume modulation at some random point and stays until a new level loads. Work In Progress eternal.
Fishies are evasive little things and I do get lots of misses myself. I have discovered that swimming in long S curves gives me a better chance to capture stuff. Also, when I have a miss like you describe, often a quick circle round gets me a meal.
A quick round down of the types of fish present in a level would be a great idea. Or maybe just the new one? Solid suggestion. Thanks. And thanks for playing and commenting :)