Do I keep my Black Rank for a year?
Yes, Black Ranks are based on your yearly Fish Points (FPs) collection. To maintain your Black Rank status you will need to meet the required FPs over the annual period:
Black Shark 5,000,000 FPs
Black Whale 1,750,000 FPs
Black Octopus 750,000 FPs
Black Fish ranked players are not required to meet a required number of FPs.