So... is Zannen na Ikimono Jiten finished or not?
NO, it is not finished.
Why?
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
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Zannen na Ikimono Jiten
ざんねんないきもの事典
Anime - Base
Release date: August 06, 2018
Zannen na Ikimono Jiten (2019)
ざんねんないきもの事典 (2019)
Anime - Sequel
Release date: July 29, 2019
Zannen na Ikimono Jiten (2021)
Encyclopedia of Pitiful Creatures (2021)
Anime - Sequel
Release date: January 31, 2021
Zannen na Ikimono Jiten (2022)
Encyclopedia of Pitiful Creatures (2022)
Anime - Sequel
Release date: February 13, 2022
Synopsis
Zannen na Ikimono Jiten is a lighthearted and educational anime that explores the surprisingly unfortunate, peculiar, or just plain odd facts about various animals.
Each episode likely presents a collection of vignettes, each focusing on a different creature and its unexpected characteristics.
The anime uses humor to introduce these interesting animal facts, making learning about nature both entertaining and engaging.
Expect to see common animals portrayed in a new light, as the series highlights their little-known quirks and flaws.
Ultimately, Zannen na Ikimono Jiten is about appreciating the imperfections and strange realities of the animal kingdom.