81000 Koi was a FORMA set released in 2019. The set contains 294 pieces, which are used to build a model of a Koi fish. Most of the pieces used are TECHNIC pieces, which build a round base at the bottom with a TECHNIC stand used to hold the main koi build. The set was included in the launch of FORMA on Indiegogo. Around 1000 sets were sold in the first wave.