Jelly

Where to find

Deepsea CaveTrial of Light - 3rd Floor

Also listed for

Maps whose monster list names it without a placed spawn.

Shipwreck

Drops

Blue Gel

Requests

Monster-Free Archipelago

Monster book

The game keeps its monster book text in Japanese only. The text table exists in nine language copies, one per release language, and all nine hold the same Japanese entries, so the game files contain no official English text for the book. This site doesn't write its own translation of game text, so the entry is shown in Japanese as the game has it.