Discard the jokers from a deck of cards. Shuffle the deck and place it face down in the middle of the players. Four is a good number for a group. The game is played according to who eats whom. Algae eat nothing.
Little fish eat algae.
Big fish eat little fish. Pelicans eat only big fish. First player draws a card and turns it over. If the card is algae or little fish, it remains in front of the player. If a little fish is drawn, it must take all untaken algae which has been drawn.