Rybička (English: Little Fish) is a small Czech pocketknife with a fish-shaped neck. It has been produced since the first decades of the 20th century. The knife was particularly popular during the socialist period in Czechoslovakia. It was appreciated as a simple and small tool used for mushroom picking, a traditional Czech hobby. It was very popular and sold in large numbers on the Czechoslovak market. Since 2014, it has been produced by Mikov in Mikulášovice, Czech Republic.
The design of the Rybička knife apparently comes from the production of Jan Maixner’s cutlery workshop, but it only gained popularity after Ignaz Rösler took over the business. The oldest catalog with the fish-shaped knife is about 80 years old (), however, some sources suggest that the design is only about 60 years old (produced since 1947 – 1955). During the second half of the 20th century, part of the production moved to Slovakia under the sister company Sandrik. The knives were identical, only the sign on the blade was different. At an exhibition of knives in Prague in 2005, Rybička received an honorable mention as “the most famous knife of Czechoslovakia”. The company also produces various collection series and luxury variants of the knife.