Kingfish are small, light yellow/orange fishes who follow Queenfish. If their queen gets caught, they will stay next to the player and try to find their queen. The Queenfish doesn't care if her Kingfishes get caught. It can be found during the day at the medium depth and it can be sold for $350 if they don't get bitten.
In-game description: This fish and his kin follow their magnificent queen.