Players take turns rolling five six-sided dice, numbered 2-6 with a crab icon replacing the 1.
Each turn a player attempts to roll, in order, 3-4-crab-2-5. If a player rolls all five correct numbers on their first roll, they score five points and may take another turn. Otherwise, the player may set aside a 3. If they do, they may then set aside a 4, and then a crab, and then a 2, stopping once they can no longer continue the sequence. After setting aside as many dice as possible, the player may reroll the remaining dice up to four times, continuing to set aside dice each reroll (maintaining 3-4-crab-2-5 order with their previously-set-aside dice). If they successfully set aside all of 3-4-crab-2-5, they score two points. The next player then takes their turn.
Play lasts for three turns per player. Whoever has the highest score at the end of the game wins.