How long do I have to complete each Fish Buffet Level?
The time-frame depends on each level, the higher the rank you achieve, the longer you will have to complete each level.
Plankton - 7 days
Goldfish - 7 days
Shrimp - 15 days
Crab - 15 days
Octopus - 30 days
Whale - 60 days
Shark - 60 days