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. Stack the algae cards with the little fish on top in front of the players. If a player turns over a big fish, it must eat all the little fish in front of the other players as well as the algae the little fish ate.