Galaxy Lantern Jellyfish — Swimming Glass Pet that Blooms for VRChat

A jellyfish made like a modern glass lamp: a galaxy turns inside its lens-shaped bell, every swimming pulse sends a ring of light down its bead tentacles, and on Bloom the bell splits into petals and opens into a galaxy lantern.

▶ VRChat floating pet · needs Modular Avatar (free, from VCC) · no lilToon needed · drag-and-drop prefab · Quest prefab included

One clear glass bell shaped like a soft lens and filled with a turning galaxy and its stars, a single polished titanium band round its rim, a ring of ruffled glass frills and 9 long strands of fine glowing glass beads.

IT SWIMS ON ITS OWN (no menu, from the moment it appears)

• A real jellyfish stroke every 2.5 s: the bell squeezes narrower and taller and the rim tucks in, the jellyfish rises with a slight lean, then glides and sinks back slowly while the tentacles trail behind
• The tentacles trail behind the body with a delay down their length, in a slow S-wave
• At each pulse a ring of light leaves the rim and runs down every bead strand to the tips
• The galaxy inside the bell turns once every 20 s

On PC it is all shader time: it keeps swimming while you stand still, with no extra parameters and no particle systems.

BLOOM (menu toggle)
1. The swimming eases to a stop and hairline seams light up across the glass bell
2. The bell splits along the seams into 16 glass petals that turn into a two-layer lotus, opening one after another, each overshooting a little and settling
3. Fully open it is a galaxy lantern: the galaxy settles into the centre of the flower, a faster inner swirl spins up, the tentacles fan out below
Opening takes 3.1 s. Turn it off and it closes in the reverse order (2.5 s), the seams fade and it starts swimming again. A change of mind always plays the current move out first: nothing jumps.

THE MENU (Expressions menu "Galaxy Jellyfish" · all remembered)

• Show: on / off. It swells in with a little overshoot (1.2 s) and shrinks away (1 s)
• Bloom: the lantern, as above
• Place: Float (beside your face) / Shoulder (over your left shoulder) / Above (over your head) / Stay (it stays where it is while you walk away). It glides to a new place in 1.2 s
• Colour: Milky Way Blue / Red Nebula / Violet Void. On PC the new colour spreads from the galaxy core outward (1 s)
• Size: a radial, 0.5x to 1.6x (starts at 1x)

3 COLOURS (all in one prefab, switched from the menu)

• Milky Way Blue (the first colour) · Red Nebula · Violet Void

SIZE (measured in Unity, at 1x)

• Bell 17 cm wide · 33.7 cm from the top of the bell to the longest tentacle tip

PC AND QUEST

• JF_GalaxyJellyfish (PC): everything above, two shaders made for it (the glass, the titanium)
• JF_GalaxyJellyfish_Quest (Quest): the same menu, swim pulse, light ring, galaxy, bloom, places and colours on VRChat/Mobile/Particles/Additive with painted pictures and bones. Differences: the glass glows instead of reflecting, the band is a light line, no hairline seam glow, each petal layer opens as one, the colour change is a quick squeeze instead of the spreading sweep

WHAT YOU GET

• JF_1.0.0.unitypackage: 2 prefabs (PC, Quest), 2 PC shaders, 5 materials (2 PC, 3 Quest), 3 textures (Quest), menu, animators
• README in English and Japanese

PERFORMANCE (this item alone, measured in Unity)

• PC prefab: 9,584 triangles · 1 mesh · 2 materials · no bones
• Quest prefab: 4,912 triangles · 1 skinned mesh · 1 material · 61 bones
• No PhysBones · no particle systems · no lights · 1 constraint
• Synced: 5 parameters, 26 bits
• VRChat SDK performance rank: PC prefab PC Excellent · Quest prefab Quest Excellent

GOOD TO KNOW

• Needs Modular Avatar (free, from the VRChat Creator Companion). No lilToon needed.
• Needs a humanoid avatar (it sits on the Head and Chest bones).
• If it floats too close or too far on your avatar, change Size or Place.
• The glow looks best in worlds with bloom.

SUPPORT

Following you, the places, Stay, the bloom, the colours or anything else not working as described in VRChat? Message me on Jinxxy and I'll fix it and send you the update for free.

TESTED WITH

Unity 2022.3.22f1 · VRChat SDK 3.10.5 · Modular Avatar 1.18.7

AI DISCLOSURE (AI-Assisted)
The code that builds this jellyfish (meshes, shaders, textures, Unity setup and animations) and the text on this page were written with help from an AI assistant. An AI image generator made rough concept sketches I looked at while designing; nothing it made is in the files or in the preview images, which are rendered in Unity from the actual prefab.

TERMS

• OK to use on your avatar in VRChat and other platforms
• OK to stream, record, and post on social media
• Editing is fine
• Please don't redistribute or resell the files, edited or not

UPDATES

• v1.0.0 (2026-11-03) first release