New cards come into play from the ocean stack in waves, with higher-value cards in the four colors, a green trump suit from 1-16, 0 cards that let you snag a card from the trick, and special-powered buoy cards that can always be played into a trick regardless of what you have in hand. With buoys, you can steal the lead or determine which color must lead the next trick, force players to pass cards or lose points; you can even steal all other cards in a trick, ideally netting yourself huge fish for use next round.

At the end of each round, score 1 point for each card you caught. Whoever lands the most points after eight rounds wins.