Vorsicht Qualle!

A sea-creature themed memory game for children.

The game contains 20 sea cards, 18 "yuck!" cards and 2 "wanted!" cards. Sea and "yuck!" cards show the same sea creatures. Some are very similar, differing only in colour or other small details. Cards also have a point value from 1-3.
The sea cards are shuffled and laid out face-down. The "yuck!" and "wanted!" cards are also shuffled and placed in a face-down stack. The player whose turn it is turns over the top card from the stack and a sea card of his/her choice. If he/she turns over a card that matches the current "yuck!" card from the stack, he/she has to take the "yuck!" card, returns all the open sea cards to the face-down state but gets to look at as many sea cards as there are points on the card.
If the top card from the stack is a "wanted!" card, players instead try to find (rather than avoid) the matching sea card. The player who earns a "wanted!" card can use it to remove one of his/her "yuck!" cards from the game.

The game ends when a player has received 5 or 7 "yuck!" cards (number depends on number of players). The player with the fewest "yuck!" cards wins the game.