UTAUs Used

Listed from left to right as they appear in the videos.

-A Sardine Grows From The Ground-

Green Haired Guy- Sousei Nemu (https://ux.getuploader.com/mixcomort/download/1/%e8%8d%89%e5%a3%b0%e3%83%8d%e3%83%a0.zip)
Mushroom- Miteinanda (no longer available)
Floating... cactus, apparently?- Cactloid (http://projectalloy.blog.fc2.com/blog-entry-3.html)
Kasane Teto- Kasane Teto (http://kasaneteto.jp/ongen_down.html)
Gray robot- Koronba 4-Gou (no longer available)
Cat Thing- Neumaf (http://www1.axfc.net/uploader/so/2618965&key=utau)
Pumpkin Guy- Pumpking the Testloid (http://utau.wiki/utau:pumpking)

-The Bluefin Tuna Comes Flying-
TV-head: Kuuspoid (no longer available)
Different Green-Haired Guy- Tsurubami (http://boxsky.tumblr.com/tsurubami)
Dancing Bottle- Yuzune Pon (https://www.axfc.net/u/1563570&key=yuzu_pon)
Koronba 4-gou
Plant Girl- Nene Nene (http://knee.iinaa.net/nenedl.html)
Dolphin guy- Mine Laru (http://utau.wikia.com/wiki/Laru_Mine)

-Lamprey Hole-
Just 4-gou and Defoko who comes with UTAU.

-.(Jellyfish)-
4-gou and Defoko again.