Can I move between Black Rank and Fish Buffet?
Yes, you can always switch back to regular Fish Buffet to try for a higher level.
Example: A Black Fish will start at Bronze Shrimp, a Black Octopus will start at Bronze Whale and a Black Whale will start at Bronze Shark.
You will receive Black Rewards for the points you have collected up to moment you switch. Any uncollected rewards will be credited to your balance and your new rank will start with 0 Fish Points (FPs)
Note: You will NOT be able to switch back to Black Rank for a period of time equivalent to the time limit of the new Bronze rank. (e.g. If you switch from Black Fish to Bronze Shrimp, you will not be able to return to Black Fish for 15 days.)