I Am Fish

Below you can find my 5 star run for each level to use as a route/time to aim for, I don't think time is affected by respawns and instead you're allowed 1-2 respawns for most levels, maybe 0 respawns for the shorter levels like goldfish level 1.

Edit: Just a heads up, the V1.1.5 patch made a lot of the 5 star requirements MUCH easier, you have a solid 5+ minutes to spare from some of the times in these videos now with multiple respawns (I've seen up to 5) lol. So yeah, you can use the videos as a general route through the level but don't feel the need to restart if you mess up because these new requirements are so much easier than before!

Goldfish Level 1: The Ocean Beckons - 3:49
Goldfish Level 2: A Minor Setback - 4:07
Goldfish Level 3: A Bridge To Freedom - 8:00
Flying Fish Level 1: The Country Life - 5:01
Flying Fish Level 2: Into The Depths - 7:57
Flying Fish Level 3: Take Flight - 13:31
Puffer Fish Level 1: Highland Roll - 4:47
Puffer Fish Level 2: Forest Stream - 11:40
Puffer Fish Level 3: Club Barnardshire - 7:48
Piranha Level 1: Tear Across Town - 8:14
Piranha Level 2: A Dangerous Crossing - 8:58
Piranha Level 3: Barnardshire General Hospital - 10:46
Finale: The Aquarium - 16:24
Bonus Level: Barnardshire Space Agency - 3:35